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Hyperthyroidism (overactive thyroid) : Causes, Types, Symptoms, Diagnosis ,Treatment , Risk factors , Complications , Prevention

 What Is Hyperthyroidism (Overactive thyroid)?

An overactive thyroid, also known as hyperthyroidism or thyrotoxicosis, is wherever the endocrine gland produces an excessive amount of the thyroid hormones.


The thyroid could be a little, however , butterfly-shaped gland within the neck, simply ahead of the cartilaginous tube (trachea). It produces hormones that have an effect on things comparable to your vital sign and body temperature.


Having too much of those hormones will cause unpleasant and doubtless serious issues which would like treatment.


Associate overactive thyroid can affect anyone, but it's concerning ten times additional common in girls than men, and generally happens between twenty and forty years of age.Hyperthyroidism could be a condition within which your thyroid creates and releases additional hormones than you need. {this is|this is often|This will be} conjointly known as active thyroid. The most hormones your thyroid makes embody liothyronine (T3) and tetraiodothyronine (T4).


gland disease can have an effect on your entire body and is a condition that must be treated by a aid provider.Hyperthyroidism, also called overactive thyroid, is once the endocrine gland makes more thyroid hormones than your body needs. The thyroid is a small, butterfly-shaped gland within the front of your neck. Thyroid hormone management means the body uses energy, so they have an effect on nearly each organ in your body, even the means your heart beats. With an excessive amount of thyroid hormone, several of your body’s functions speed up.


What Is Hyperthyroidism (Overactive thyroid)


Explanation of medical terms and concept Hyperthyroidism (overactive thyroid)

Hyperthyroidism occurs when your thyroid gland produces too much thyroid hormone Normally the thyroid gland releases just enough of this hormone to help keep your body’s cells and tissues functioning properly When there is too much of a substance in the body it can cause problems or symptoms When you have hyperthyroidism it means that your thyroid gland has become overactive and is producing an excessive amount of thyroid hormone (hyper) This excess hormone affects all the systems in your body and can produce different symptoms depending on which organs are affected These include: Heart : Increased heart rate (tachycardia) and palpitations (irregular heartbeat).

Hyperthyroidism (overactive thyroid) occurs once your thyroid produces an excessive amount of the endocrine thyroxine. glandular disorder can accelerate your body' metabolism, inflicting unintentional weight loss and a fast or irregular heartbeat. Many treatments are offered for hyperthyroidism. Doctors use anti-thyroid medications and hot iodine to slow the assembly of thyroid hormones. Sometimes, hyperthyroidism treatment involves surgery to get rid of all or a part of your thyroid gland. Though hyperthyroidism is often serious if you ignore it, most people respond well once hyperthyroidism is diagnosed and treated. glandular disorder can mimic different health problems, which may build it difficult for your doctor to diagnose. It can even cause a good sort of signs and symptoms.

Symptoms Hyperthyroidism (overactive thyroid)

Hyperthyroidism can mimic different health problems, which may create it tough for your doctor to diagnose. It may cause a large form of signs and symptoms, including:

  • Unintentional weight loss, even when your appetite and food intake stay the same or increase

  • Rapid heartbeat (tachycardia) — commonly more than 100 beats a minute

  • Irregular heartbeat (arrhythmia)

  • Pounding of your heart (palpitations)

  • Increased appetite

  • Nervousness, anxiety and irritability

  • Tremor — usually a fine trembling in your hands and fingers

  • Sweating

  • Changes in menstrual patterns

  • Increased sensitivity to heat

  • Changes in bowel patterns, especially more frequent bowel movements

  • An enlarged thyroid gland (goiter), which may appear as a swelling at the base of your neck

  • Fatigue, muscle weakness

  • Difficulty sleeping

  • Skin thinning

  • Fine, brittle hair

Older adults are additional seemingly to possess either no signs or symptoms or refined ones, resembling associated exaggerated heart rate, heat intolerance and an inclination to grow tired throughout normal activities.

Graves' ophthalmopathy

Sometimes associate degree uncommon drawback referred to as Graves' ophthalmopathy could have an effect on your eyes, particularly if you smoke. This disorder makes your eyeballs protrude on the far side of their traditional protecting orbits once the tissues and muscles behind your eyes swell. Eye issues usually improve while not treated.

Signs and symptoms of Graves' ophthalmopathy include:

  • Dry eyes

  • Red or swollen eyes

  • Excessive tearing or discomfort in one or both eyes

  • Light sensitivity, blurry or double vision, inflammation, or reduced eye movement

  • Protruding eyeballs

When to see a doctor

If you expertise unexplained weight loss, a fast heartbeat, uncommon sweating, swelling at the bottom of your neck or alternative signs and symptoms related to gland disease, see your doctor. It's vital to utterly describe the changes you've observed, as a result of several signs and symptoms of hyperthyroidism is also associated with a variety of other conditions. If you've been treated for hyperthyroidism otherwise you presently are being treated, see your doctor often as suggested so he or she will be able to monitor your condition. 

Causes Hyperthyroidism (overactive thyroid)

Hyperthyroidism will be caused by a variety of conditions, as well as Graves' sickness, Plummer' disease and thyroiditis. Your thyroid could be a small, butterfly-shaped gland at the bottom of your neck, slightly below your Adam' apple. The endocrine has a huge impact on your health. Each side of your metabolism is regulated by thyroid hormones. Your thyroid gland produces 2 main hormones, tetraiodothyronine (T4) and liothyronine (T3), that influence every cell in your body. They maintain the speed at which your body uses fats and carbohydrates, facilitate management of your body temperature, influence your heart rate, and regulate the assembly of protein. Your thyroid additionally produces an internal secretion that helps regulate the number of atomic number 20 in your blood (calcitonin). 

Hyperthyroidism has several causes, including

  • Graves’ disease

  • overactive thyroid nodules

  • inflammation of the thyroid gland, called thyroiditis

  • too much iodine NIH external link

  • too much thyroid hormone medicine

  • a noncancerous tumor of the pituitary gland

Reasons for too much thyroxine (T4)

Normally, your thyroid releases the correct quantity of hormones, however typically it produces an excessive amount of T4. this might occur for variety of reasons, including:

  • Graves' disease. Graves' disease is an associate degree disease during which antibodies created by your system stimulate your thyroid to provide an excessive amount of T4. It's the foremost common reason behind hyperthyroidism. 

  • Hyperfunctioning thyroid nodules (toxic adenoma, toxic multinodular goiter or Plummer's disease). This form of glandular disease happens once one or a lot of nonmalignant tumors of your thyroid turn out an excessive amount of T4. AN adenoma may be a part of the secretor that has walled itself aloof from the remainder of the gland, forming non cancerous (benign) lumps which will cause an enlargement of the thyroid. 

  • Thyroiditis. Sometimes your thyroid will become inflamed once pregnancy, thanks to a reaction condition or for unknown reasons. The inflammation can cause excess internal secretion within the gland to leak into your bloodstream. Some forms of rubor could cause pain, whereas others are painless. 

Risk factors Hyperthyroidism (overactive thyroid)

With most treatments, there also are risks of aspect results. It’s vital to speak to your attention supplier and weigh all of the benefits and downsides before preferring a treatment plan. A number of these risks include: Medication side effects: the 2 medications that may treat adenosis are methimazole and organic compound (PTU). These medicines can cause many side effects. One rare side effect that affects below 1% of individuals is potential liver damage, which can be permanent within the case of PTU. Another rare (less than 1%) however serious side effect is agranulocytosis (severe drop by white blood corpuscle count). These results will happen to individuals of any age. In pregnant people, this medication can pass from parent to baby through the placenta. This might cause adenomyosis or the event of a stomach ache within the unborn  baby. Pregnant people are closely monitored owing to this side effect. There’s conjointly a break of a sensitivity to those medications, that happens in regarding 5% of people. radioactive  materials: Whenever radiation is involved, there’s a doable side effect of cancer. Currently, there’s no link between mistreatment of radioactive iodine to treat adenosis and developing cancer. This is often considered low-risk and unlikely. One risk that's notable is between a pregnant or breastfeeding person and their baby. You shouldn’t take radioactive  iodine whereas pregnant or breastfeeding as a result of it can have an effect on your baby’s thyroid gland. Sometimes, you'll be able to lose sensation in your mouth once radioactive iodine (RAI) therapy. This is often common. however don’t worry — albeit it can last for up to a number of months, the feeling will return to your mouth over time. Surgery: There are invariably sure risks coupled to surgery, like infection and bleeding. Surgery is usually thought-about a really effective treatment for hyperthyroidism. In rare situations, complications like dysfunction of the vocal cords (inability to speak) and harm to your ductless gland glands will happen, which ends in low atomic number 20 in your blood. Once treated, you’ll presumably have to take replacement hormones for the remainder of your life. This is often as a result of a number of these treatments — particularly surgery — cut back your thyroid hormone levels to terribly low levels or eliminate this hormone by removing your thyroid. You’ll need to re-introduce the thyroid hormones into your system by taking regular medication.

Risk factors for hyperthyroidism, include:

  • A family history, particularly of Graves' disease

  • Female sex

  • A personal history of certain chronic illnesses, such as type 1 diabetes, pernicious anemia and primary adrenal insufficiency

Complications

Hyperthyroidism can lead to a number of complications:

  • Heart problems. Some of the foremost serious complications of adenosis involve the heart. These embody a fast heart rate, a cardiac rhythm disorder referred to as cardiac arrhythmia that will increase your risk of stroke, and symptom failure — a condition during which your heart can't flow enough blood to fulfill your body' needs. 

  • Brittle bones. Untreated glandular disorder can even cause weak, brittle bones (osteoporosis). The strength of your bones depends, in part, on the number of Ca and alternative minerals they contain. an excessive amount of internal secretion interferes along with your body' ability to include calcium into your bones. 

  • Eye problems. People with Graves' ophthalmopathy develop eye issues, as well as bulging, red or swollen eyes, sensitivity to light, and blurring or double vision. Untreated, severe eye problems will cause vision loss. 

  • Red, swollen skin. In rare cases, individuals with Graves' malady develop Graves' dermopathy. This affects the skin, inflicting redness and swelling, usually on the shins and feet. 

  • Thyrotoxic crisis. Hyperthyroidism conjointly places you in danger of gland disease crisis — a fulminant intensification of your symptoms, resulting in a fever, a speedy pulse and even delirium. If this occurs, get immediate medical care. 

Diagnosis Hyperthyroidism (overactive thyroid)

There are signs and symptoms of gland disease that may be known by a medico. Signs and symptoms of hyperthyroidism are usually non-specific and may even be related to several different causes. Laboratory take a look at are wont to make sure the diagnosing of hyperthyroidism and probable cause. A medical care physician may build the diagnosis of hyperthyroidism, however facilitation could also be required from an endocrinologist, a physician who may be a specialist in thyroid and other endocrine diseases. The most effective test to see overall thyroid operate is that the thyroid stimulating internal secretion (TSH) level. Thyrotropin is made within the brain and travels to the endocrine gland to stimulate the thyroid to supply and unharness a lot of hormones. A high thyrotropin level indicates that the body doesn't have enough thyroid hormone. A TSH level below traditional indicates there's sometimes quite enough thyroid hormone within the body and will indicate gland disease. Once hyperthyroidism develops, free T (T4) and free thyroid hormone (T3) levels rise higher than normal. Different laboratory studies may facilitate establishing the reason behind hyperthyroidism. Thyroid-stimulating immunoglobulins (TSI) may be known in the blood when Graves' disease is the cause of hyperthyroidism. Thyroid oxidase antibodies and other anti-thyroid antibodies are also seen in some disorders resulting in hyperthyroidism.

Hyperthyroidism is diagnosed using:

  • Medical history and physical exam. During the test your doctor could try and observe a small tremor in your fingers once they're extended, hyperactive reflexes, eye changes and warm, damp skin. Your doctor also will examine your thyroid as you swallow to examine if it's enlarged, jolting or tender and check your pulse to see if it's speedy or irregular. 

  • Blood tests. Blood tests that show T and thyrotropin (TSH) will make sure of the diagnosis. High levels of thyroxine and low or nonexistent amounts of TSH indicate an active thyroid. The quantity of TSH is vital as a result of it, the hormone that signals your ductless gland to provide a lot of thyroxine. These tests are notably necessary for older adults, who might not have classic symptoms of hyperthyroidism. Thyroid blood tests may offer false results if you're taking vitamin B — a B supplement which will even be found in multivitamins. Let your doctor apprehend if you're victimizing biotin or a vitamin pill with vitamin B. To confirm the correct test, stop taking biotin a minimum of twelve hours before blood is taken. If blood tests indicate hyperthyroidism, your doctor might suggest one amongst the subsequent tests to assist verify why your thyroid is overactive: 

  • Radioiodine uptake test. For this test, you are taking a small, oral dose of radioactive  iodine (radioiodine) to envision what quantity can collect in your endocrine gland. You'll be checked once four, six or twenty four hours — and generally finally 3 time periods — to see how much iodine your thyroid has absorbed. A high uptake of radioiodine indicates your thyroid gland is manufacturing an excessive amount of thyroid hormone. The foremost seemingly cause is either Graves' illness or hyperfunctioning thyroid nodules. If you've got adenosis and your radioiodine uptake is low, this means that the thyroxine held on within the gland is leaky into the bloodstream, which can mean you've got thyroiditis. 

  • Thyroid scan. During this check, you'll have a radioactive  atom injected into the vein on the inside of your elbow or typically into a vein in your hand. You then lie on a table along with your head stretched backward whereas a special camera produces a picture of your endocrine on a pc screen. This test shows however iodine collects in your thyroid. 

  • Thyroid ultrasound. This check uses high-frequency sound waves to supply pictures of the thyroid. Ultrasound could also be higher at detecting thyroid nodules than alternative tests, and there' no exposure to any radiation. 

Treatment Hyperthyroidism (overactive thyroid)

Currently, there are several effective treatments out there for gland disease counting on the cause, severity, and a number of other other factors. The foremost common treatments for hyperthyroidism embody antithyroid medications, radioactive  iodine, and thyroid surgery. Antithyroid medication (most often methimazole) decreases hormone production. Antithyroid drugs don't cure the disease however it works whereas the patient takes the medication. It's not sometimes counseled as a protracted term solution, though in some patients the hyperthyroidism will go into remission and therefore the medication is discontinued. If the hyperthyroidism does not go into remission after 2 years, an additional definitive treatment is often counseled (thyroidectomy or radioactive  iodine). radioactive  iodine (RAI) may be a common treatment for gland disease. The thyroid is one in all the few organs within the body that avidly takes up iodine. This enables radioactive iodine to by selection harm the thyroid while not moving alternative elements of the body. The thyroid gland is eventually destroyed and disappears and therefore the body does not produce its own thyroid hormone. In general, this treatment is utilized in patients with Graves' illness or in those patients with nodules in the thyroid gland inflicting hyperthyroidism. Not all cases of hyperthyroidism respond well to radioactive  iodine. when radioactive iodine most patients would force hormone replacement with levothyroxine (Synthroid, Levothroid, and alternative complete names). hormone levels are going to be checked off at the beginning, then often are solely checked once a year after the proper dose of thyroid hormone for the patient has been determined. Some patients can have their gland disease treated by having half or all of their thyroid surgically removed. Deciding that treatment for hyperthyroidism is that the right treatment is created on a case by case basis in line with every individual patient’s medical, social, and family history. Often, surgical extirpation is suggested over RAI within the following circumstances: 

  • Large thyroid causing compressive symptoms unlikely to be treated adequately with RAI

  • Significant compression of adjacent structures and compressive symptoms

  • Moderate to severe Graves’ eye disease

  • Failed medical therapy

  • Adverse reaction to antithyroid medications

  • Need for rapid reversal of hyperthyroidism

  • Fear of radiation exposure, inability to comply with radiation safety guidelines

  • Co-existent thyroid nodules and need to rule out possibility of thyroid cancer

  • Small children at home

  • Pregnancy, desire for pregnancy within next 4-6 months, or lactation

  • Patient desire

Several treatments for adenosis exist. The most effective approach for you depends on your age, physical condition, the underlying reason for the hyperthyroidism, personal preference and also the severity of your disorder. doable treatments include:

  • Radioactive iodine. Taken by mouth, hot iodine is absorbed by your thyroid secreter, wherever it causes the gland to shrink. Symptoms sometimes subside at intervals of many months. Excess radioactive iodine disappears from the body in weeks to months. This treatment may cause thyroid activity to slow enough to be thought of as inactive (hypothyroidism), and you will eventually have to take medication daily to interchange thyroxine. 

  • Anti-thyroid medications. These medications bit by bit cut back symptoms of thyrotoxicosis by preventing your endocrine gland from manufacturing excess amounts of hormones. They embrace methimazole (Tapazole) and propylthiouracil. Symptoms sometimes begin to enhance at intervals many weeks to months, however treatment with antithyroid medications typically continues a minimum of a year and infrequently longer. For a few people, this clears up the matter permanently, but people could experience a relapse. Each medication will cause serious liver damage, sometimes resulting in death. As a result of organic compounds has caused many more cases of liver damage, it typically ought to be used only if you can't tolerate methimazole. attiny low range of individuals who are allergic to those medications could develop skin rashes, hives, fever or joint pain. They can also cause you to additional liable to infection. 

  • Beta blockers. Although these medications are sometimes wont to treat high pressure levels and don't have an effect on thyroid levels, they'll ease symptoms of hyperthyroidism, equivalent to a tremor, fast vital sign and palpitations. For that reason, your doctor could order them to assist you're feeling higher till your thyroid levels are nearer to normal. These medications usually aren't counseled for those that have asthma, and aspect effects may embrace fatigue and sexual dysfunction. 

  • Surgery (thyroidectomy). If you're pregnant otherwise you otherwise can't tolerate Associate in Nursing-thyroid medicine and don't wish to or can't have hot iodine therapy, you'll be a candidate for thyroid surgery, though this can be a possibility in precisely a number of cases. In an exceedingly thyroidectomy, your doctor removes most of your endocrine. Risks of this surgery embrace injury to your vocal cords and endocrine gland glands — four little glands set on the rear of your thyroid gland that facilitate management of the amount of metal in your blood. In addition, you'll need womb-to-tomb treatment with levothyroxine (Levoxyl, Synthroid, others) to provide your body with traditional amounts of thyroid hormone. If your endocrine gland glands are removed, you'll want medication to stay your blood-calcium levels normal. 

Graves' ophthalmopathy

If Graves' sickness affects your eyes (Graves' ophthalmopathy), you'll be able to manage gentle signs and symptoms by exploiting artificial tears and lubricating gels and by avoiding wind and bright lights. If your symptoms are a lot of severe, your doctor might advocate treatment with corticosteroids, equivalent to prednisone, to cut back swelling behind your eyeballs. 2 medication — rituximab (Rituxan) and teprotumumab — are being employed to treat Graves' ophthalmopathy, albeit there isn't heaps of definitive proof however to prove that they're effective. Teprotumumab received fast-track approval from the Food and Drug Administration supporting one little study. A lot of study of each medication as a treatment for Graves' ophthalmopathy is needed.

In some cases, a surgical procedure may be an option:

  • Orbital decompression surgery. In this surgery, your doctor removes the bone between your cavity and your sinuses — the air areas next to the attention socket. Once the procedure is successful, it improves vision and provides an area for your eyes to come back to their traditional position. however there's a risk of complications, together with vision defects that persist or seem when surgery. 

  • Eye muscle surgery. Sometimes connective tissue from Graves' ophthalmopathy will cause one or additional eye muscles to be too short. This pulls your eyes out of alignment, resulting in visual impairment. Muscle surgery might facilitate correct double vision by cutting the affected muscle from the eyeball and reattaching it farther back. 

Lifestyle and home remedies

Once begin} treatment, symptoms of thyrotoxicosis should subside and you must start feeling better. However, your doctor might advocate that you simply lookout for iodine in your diet as a result of it will cause hyperthyroidism or build it worse. Kelp, red algae et al. styles of algae contain loads of iodine. Cough sweetener and multivitamins conjointly may contain iodine.

Graves' disease

If you've got Graves' ophthalmopathy or dermopathy, the subsequent suggestions might facilitate your eyes or skin:

  • Don't smoke. Smoking has been linked to the development of Graves' ophthalmopathy and can make the condition worse after treatment.

  • Keep your eyes lubricated. Eye Drops could relieve condition and abrasiveness at any time of the day. If your eyes don't fully close, you'll be able to tape your eyelids shut, or use a lubricating gel at hour to stay the membrane from drying out. A cool compress may give relieving moisture. 

  • Protect your eyes. Wear sunglasses to help protect your eyes from the sun and wind.

  • Keep your head up. Raising the head of your bed may reduce swelling and relieve pressure on your eyes.

  • Try over-the-counter creams for swollen skin. Over-the-counter creams containing cortisol (Cortizone-10, others) could relieve red, swollen skin on your shins and feet. For help finding these creams, confer with your pharmacist. 

Coping and support

If you've been diagnosed with hyperthyroidism, the foremost necessary factor is to receive the required medical care. When you and your doctor have selected a course of action, there are some things you will try that can assist you influence the condition and support your body throughout its healing process.

  • Get regular exercise. Exercise normally can assist you feel higher and improve your muscular tonus and vas system. Weight-bearing exercise is vital for individuals with Graves' sickness as a result of it facilitates maintaining bone density. Exercise can also help scale back your craving and increase your energy level. 

  • Learn relaxation techniques. Many relaxation techniques will assist you maintain a positive outlook, particularly once handling illness. It's well-documented that in Graves' malady stress may be a risk factor, thus learning to relax and attain balance in your life can facilitate maintaining physical and mental well-being. 

Preparing for your appointment

You'll probably begin by seeing your medical aid doctor. However, in some cases, you'll be referred forthwith to a doctor who makes a speciality of the body' hormone-secreting glands (endocrinologist). If you've got eye involvement, you may even be stated as a watch doctor (ophthalmologist). It's sensible to arrange for your appointment. Here's some data to assist you make preparations for your appointment, and to understand what to expect from your doctor.

What you can do

  • Be aware of any pre-appointment restrictions. When you make the appointment, ask if there's anything you need to do in advance.

  • Write down any symptoms you're experiencing, including any that may seem unrelated to the reason for which you scheduled the appointment.

  • Write down key personal information, including any major stresses or recent life changes.

  • Make a list of all medications, vitamins or supplements you're taking, especially any supplements or vitamins containing biotin.

  • Take a family member or friend along, if possible. Someone who accompanies you may remember information you missed or forgot.

  • Write down questions to ask your doctor.

Preparing an inventory of queries can assist you create the foremost of some time along with your doctor. For hyperthyroidism, some basic inquiries to raise your doctor include:

  • What's the most likely cause of my symptoms?

  • Are there other possible causes?

  • What tests do I need?

  • Is my condition likely temporary or long lasting?

  • What treatment options are available, and which do you recommend for me?

  • I have these other health conditions. How can I manage these conditions together?

  • Should I see a specialist?

  • Is there a generic alternative to the medicine you're prescribing?

  • Do you have brochures or other printed material I can take? What websites do you recommend?

Don't hesitate to ask any other relevant questions you have.

What to expect from your doctor

Your doctor is likely to ask you a number of questions, including:

  • When did you begin having symptoms?

  • Have your symptoms been continuous or occasional?

  • How severe are your symptoms?

  • What, if anything, seems to improve your symptoms?

  • What, if anything, makes your symptoms worse?

  • Do other members of your family have thyroid disease?

  • Have you had any recent radiology scans that used intravenous contrast?

General summary

At what TSH level should hyperthyroidism be treated?

TSH stands for thyroid-stimulating hormone It's secreted by the pituitary gland in your brain and tells your thyroid gland to produce more hormones If you have hyperthyroidism your TSH will be elevated indicating that your pituitary is over-stimulated by the excess thyroid hormone Most doctors follow the guidelines set forth by the American Association of Clinical Endocrinologists when deciding whether or not to treat hyperthyroidism with medication The AACE recommends treatment when a person's TSH level reaches 10 mIU/dL Some doctors may opt to wait until a person's TSH is between 5 mIU/dL and 10 m.

Can you be hospitalized for hyperthyroidism?

Most people can manage hyperthyroidism with medications but if your symptoms are severe or you don't respond to treatment you may need to have radioactive iodine injected into your thyroid The radioactive iodine destroys the thyroid gland and stops the production of excess thyroid hormone.

What level is hyperthyroidism?

Hyperthyroidism is a condition that occurs when your thyroid gland produces excessive amounts of the hormones thyroxine (T4) and triiodothyronine (T3) These hormones control many processes in the body including heart rate blood pressure and body temperature When your thyroid produces too much of these hormones it can cause a number of symptoms.

What is a dangerously high TSH level?

High levels of TSH (thyroid-stimulating hormone) can be caused by stress medications and pregnancy Stress can increase the production of TSH as can some medications Some medications that are used to treat cancerous tumors or diseases such as leukemia and lymphoma also increase the production of TSH A pregnant woman's body produces high amounts of TSH when she is expecting a baby but her body will produce much less after childbirth High levels of TSH can cause a person's thyroid gland to produce too much thyroid hormone This is called hyperthyroidism and occurs in about one in 1,000 people Hyperthyroidism causes a person's.

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Hyperthyroidism (overactive thyroid) : Causes, Types, Symptoms, Diagnosis ,Treatment , Risk factors  , Complications , Prevention

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