Polymorphous light eruption :Causes-Symptoms-Diagnosis-Treatment

 What is a polymorphous light eruption (PMLE)?

Polymorphous light-weight eruption (PMLE) may be a common eruption typically caused by the exposure to the sun's actinic radiation.

Polymorphous light-weight eruption (PMLE), a typical skin condition within the style of a rash, is mostly triggered by exposure to ultraviolet (UV) light-weight. generally it's referred to as polymorphic light-weight eruption. “Polymorphous” means that it's totally different for several people.

What is a polymorphous light eruption (PMLE)?
polymorphous light eruption

PMLE shows on elements of the body exposed to {uv|ultraviolet|ultraviolet radiation|ultraviolet light-weight|ultraviolet illumination|UV|actinic radiation|actinic ray} light, as well as the arms, hands, chest, legs and feet. it's a benign (not cancerous) condition that resolves while not scarring.

  1. Skin

  2. Subcutaneous tissue

Medical terms

  • Polymorphous lightweight eruption could be a rash caused by sun exposure in folks that have developed sensitivity to daylight. The rash sometimes seems as small, inflamed bumps or slightly raised patches of skin.
  • The reaction sometimes happens throughout spring and early summer once exposure to daylight will increase. It's less likely to be recurrent because the summer progresses. however the rash typically happens once more every year once the primary time. If you are going to develop this sensitivity, the primary instance can probably be in your teens or 20s.
  • The condition is additionally called polymorphic lightweight eruption, sun allergic reaction and sun poisoning.
  • Polymorphous lightweight eruption sometimes goes away on its own while not scarring among ten days. individuals with severe or persistent rashes may have medication.
  • (PMLE) Polymorphous light eruption (PMLE) is a common skin condition that causes red itchy lumpy spots on the upper trunk and face These patches resemble freckles but those affected often have a history of sun exposure and do not tan well The rash can be very uncomfortable for some people especially if it appears on their faces PMLE does not usually leave scars or cause other serious complications However patients with this condition should avoid exposure to sunlight whenever possible

This rash is a type of hives It causes red itchy lumps on the skin that come and go within minutes It affects people with fair skin and is more common during the summer months in climates that are very sunny such as Florida The cause of polymorphous light eruption (PMLE) is believed to be sun exposure but may be triggered by other factors including stress or taking certain medications for cholinergic urticaria (hives caused by exposure to hot temperatures or spicy foods) The best treatment for this condition is limiting your time in direct sunlight and using a sunscreen of at least SPF

Who is likely to have a polymorphous light eruption (PMLE)?

While anyone will develop PMLE, the condition is commonest in individuals beneath age forty. It most frequently happens within the spring and summer in residents of a temperate climate. Or it will occur once there's an abrupt increase in one’s level of sun exposure, like on a sunny vacation. 

Symptoms Polymorphous light eruption(PMLE)

Symptoms of the rash in polymorphous light eruption may include:

  • Dense clusters of small bumps and blisters

  • Inflamed, raised rough patches

  • Itching or burning

People could seldom produce other symptoms like fever and chills.

In polymorphous light-weight eruption, eruption refers to the rash that sometimes seems half-hour to many hours when sun exposure. The rash sometimes seems on square measures of the body that are coated throughout winter however exposed in summer like the higher chest, front of the neck and arms.

When to see a health care provider

See your health care supplier if you've got any rash with no obvious cause, like a well-known allergic reaction or recent contact with poison common ivy.

Polymorphous light-weight eruption rashes look kind of like rashes caused by alternative diseases, a number of that are serious. Therefore it is important to urge a prompt designation and treatment.

Seek immediate medical care if your rash is:

  • Widespread

  • Painful

  • Accompanied by fever

Causes Polymorphous light eruption(PMLE)

The exact explanation for polymorphous light-weight eruption is not understood. The rash seems in folks that have developed sensitivity to daylight, particularly ultraviolet (UV) radiation from the sun or alternative sources, like tanning beds. This is often referred to as sensibility. It ends up in system activity that causes a rash.

UV radiation

UV radiation may be a wavelength of daylight during a time very short for the human eye to ascertain. light-weight|ultraviolet illumination|UV|actinic radiation|Actinic ray} light that reaches the world is split into 2 wavelength bands — ultraviolet A (UVA) and ultraviolet B (UVB).

A person with sensibility will react to each kind of ultraviolet light radiation. UVB does not penetrate glass. UVA does. Exposure to daylight through windows could be|or perhaps} sunscreen-protected skin may cause a reaction in some individuals with sensibility.


With polymorphous light eruption, sensitivity to sunlight lessens with repeated exposure. Features of polymorphous light eruption are somewhat predictable:

  • An episode is most likely to occur after the first one or two times of sun exposure after a long period of no exposure, such as in spring or early summer.

  • Episodes are less likely to happen as the summer progresses.

  • After the first episode, it's likely to happen each year. Some people gradually become less sensitive over several years and eventually no longer experience the yearly rash.

Risk factors Polymorphous light eruption(PMLE)

Anyone can develop polymorphous light eruption, but several factors are associated with an increased risk of the condition:

  • Being female

  • Having skin that sunburns easily

  • Living in northern regions

  • Having a family history of the condition

Is polymorphic light eruption an autoimmune disease?

No Polymorphic light eruption is not a type of autoimmune disorder Autoimmune disorders occur when the body’s immune system attacks the body's own organs and cell tissue resulting in a range of serious medical conditions such as lupus rheumatoid arthritis inflammatory bowel disease and thyroiditis People with polymorphic light eruption have skin cells that are hypersensitive to sunlight or artificial UV rays after ultraviolet damage to their skin.

How do you get rid of a sun rash fast?

Make sure you’re wearing sunscreen with an SPF of at least 30. The higher the number the more protection it provides It should also have “broad-spectrum” on the label which means it effectively blocks both UVA and UVB radiation Apply it 20 minutes before going outside and reapply every two hours or after swimming or sweating profusely If possible stay in the shade when going out into the sun You can also try wearing protective clothing like long sleeves pants and wide-brimmed hats to cover your skin from direct sunlight as much as possible.

Why am I allergic to the sun all of a sudden?

You need to check if your doctor has prescribed any new medicines for you recently Sometimes the allergic reaction can be caused due to allergy from some drug that is commonly prescribed by doctors like antibiotics or antifungal medications Consult with your doctor and ensure that you are using the medication as per their advice Use of sunscreen is also very important during this period If there is no medicine involved then it could be a change in your job timings which might result in lack of sleep and disturbance in the routine Make sure that sleep deprivation does not cause back-to-back sleeping patterns resulting in loss of sleep at night.

Do Antihistamines help PMLE?

Antihistamines are available under many brand names They are sold without a prescription and can be obtained either over-the-counter or with a doctor's prescription They work best when taken at bedtime because the medication will cause sleepiness during the day Antihistamines come in two types: those that work on the histamine in your nose (called first generation antihistamines) and those that block histamine through different mechanisms (second generation antihistamines).

Is Vitamin D good for PMLE?

Dermatologists sometimes prescribe vitamin D supplements to patients in order to help with many skin conditions including psoriasis and atopic dermatitis And while they’re not typically prescribed for severe cases of PMLE it may be worth talking to your dermatologist about if you suffer from mild symptoms that don’t respond well to steroid creams Vitamin D plays a role in our immune system so there are some who believe the supplements can serve as an alternative when steroids aren’t enough to clear up acne breakouts.

Does sunscreen prevent PMLE?

No sunscreen with SPF 30 or more offers high protection against melanoma (the most deadly form of skin cancer) but it doesn't prevent the development of PMLE Some foundations and moisturizers that contain sunscreen can help you to get some protection against PMLE while also keeping your skin looking healthy It's a good idea to use products with sunscreen labeled as broad-spectrum which protect against both UVA and UVB rays; however these need to have an SPF 15 or higher for full-body coverage A hat is another good way to protect yourself from sun exposure during the summer months.

Diagnosis Polymorphous light eruption(PMLE)

Polymorphous lightweight eruption is usually diagnosed with an intensive history and skin examination. A skin diagnostic assay, or tissue sample, could also be obtained to substantiate the designation.

Your doctor might advocate a biopsy to rule out different medical conditions like autoimmune disorder, AN disease which will conjointly cause a facial rash.

Your health care supplier will in all probability build a designation of polymorphous lightweight eruption supporting a physical examination and your answers to queries. Your health care supplier may need you to endure laboratory tests so as to substantiate a designation or rule out different conditions. Tests might include:

  • Skin biopsy. Your health care provider removes a sample of rash tissue (biopsy) for testing in a lab.

  • Blood tests. A member of your care team draws blood for testing in a lab.

  • Phototesting. A specialist in skin conditions (dermatologist) exposes tiny areas of your skin to measured amounts of UVA and UVB light-weight to do to breed the matter. If your skin reacts to ultraviolet radiation, you are thought-about sensitive to daylight (photosensitive) and will have polymorphous light-weight eruption or another light-induced disorder. 

Other light-induced conditions

Your health care provider might need to rule out other disorders characterized by light-induced skin reactions. These conditions include:

  • Chemical photosensitivity. A number of chemicals — medication, medicated lotions, fragrances, plant merchandise — will induce sensibility. Once this happens, the skin reacts anytime it's exposed to daylight when ingesting or coming back into contact with a specific chemical. 

  • Solar urticaria. Solar rash may be a sun-induced sensitivity that produces hives — raised, inflamed, fidgety welts that seem and disappear on the skin. The welts will seem among a couple of minutes of sun exposure and last for a couple of minutes to hours. A star rash may be a chronic condition which will last for years. 

  • Lupus rash. Lupus is an inflammatory disorder that affects a number of body systems. One symptom is the appearance of a bumpy rash on areas of skin exposed to sunlight, such as the face, neck or upper chest.

Treatment Polymorphous light eruption(PMLE)

Treatment of polymorphous light-weight eruption sometimes is not required as a result of the rash sometimes goes away on its own within ten days. If your symptoms are severe, your health care supplier could inflict anti-itch drugs (a corticoid cream or pill).


Your health care supplier could recommend radiotherapy to stop seasonal episodes of polymorphous light-weight eruption if you have got disabling symptoms. This exposes the skin to little doses of UVA or UVB light-weight that helps your skin be less sensitive to light-weight. It mimics the accrued exposure you'd experience throughout a summer.

Lifestyle and home remedies

Self-care measures that may help ease signs and symptoms include:

  • Applying anti-itch cream. Try a non-prescription anti-itch cream, which may include products containing at least 1% hydrocortisone.

  • Taking antihistamines. If itching is a problem, oral antihistamines may help.

  • Using cold compresses. Apply a towel dampened with cool tap water to the affected skin. Or take a cool bath.

  • Leaving blisters alone. To speed healing and avoid infection, leave blisters intact. If needed, you can lightly cover blisters with gauze.

  • Taking a pain reliever. A nonprescription pain medication may help reduce inflammation and pain.

  • Protect the rash from further sun exposure. When you go outside, cover the area where the rash developed.

To lessen the likelihood of recurring episodes of polymorphous light eruption, take the following precautions:

  • Avoid the sun between 10 a.m. and 2 p.m. Because the sun's rays are most intense during this time, try to schedule outdoor activities for other times of the day.

  • Use sunscreen. Fifteen minutes before going outdoors, apply a broad-spectrum cream, one that has protection from each UVA and UVB light-weight. Use a cream with a sun protection issue (SPF) of a minimum of thirty. Apply cream munificently, and reapply each 2 hours — or additional typically if you are swimming or sweaty. If you are employing a spray cream, make sure to hide the complete space fully. 

  • Cover up. For protection from the sun, wear tightly woven covering that covers your arms and legs. contemplate sporting a wide hat, that provides additional protection than will a cap or visor.
    Consider sporting covering designed to supply sun protection. rummage around for garments labeled with associate degree ultraviolet protection issue (UPF) of forty to fifty. Follow care directions on the label of UV-blocking garments to take care of their protecting feature. 

Preparing for your appointment

You're probably beginning by seeing your medical care doctor. He or she might refer you to a specialist in skin diseases (dermatologist).

Here's some info to assist you make preparations for your appointment.

What you can do

  • Be aware of any pre-appointment restrictions. At the time you make the appointment, be sure to ask if you need to do anything in advance.

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

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

  • List all medications, vitamins or supplements that you're taking, including doses.

  • List questions to ask your healthcare provider.

For polymorphous light eruption, some basic questions to ask your health care provider include:

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

  • What tests do I need? Do they require any special preparation?

  • Is this condition temporary or long lasting?

  • Is it possible this condition is related to a more serious illness?

  • What treatments are available, and which do you recommend?

  • What side effects can I expect from treatment?

  • Do I need to follow any restrictions?

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

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

What to expect from your healthcare provider

Your health care provider will ask you a number of questions about your symptoms and your medical history, such as:

  • When did the rash appear?

  • Does it itch or cause pain?

  • Have you had a fever associated with the rash?

  • Do you have any other symptoms?

  • Did you recently start a new medication?

  • Have you recently used a cosmetic or fragrance in the area of the rash?

  • Have you had a similar rash before? When?

  • Has the duration of your sunlight exposure increased recently?

  • Have you recently used a tanning bed or lamp?

  • Do you use sunscreen?

What you can do in the meantime

.Avoid sun exposure whenever attainable. If you cannot avoid the sun, use a broad-spectrum sun blocker with associate degree SPF of a minimum of thirty in areas that can't be protected by vesture. Apply it liberally quarter-hour before sun exposure. Reapply it each 2 hours or a lot typically if you are swimming or sweating. this would possibly not altogether defend you from a reaction, as ultraviolet A might penetrate through most sunscreens

General summary

  1. Polymorphous light eruptions commonly known as PMLE are a common skin condition that develops during the spring and summer months The outbreaks frequently resemble bug bites and typically appear on areas of the body exposed to sun or artificial light While largely harmless PMLE can be treated with topical medications or phototherapy treatment at your dermatologist's office Read on to discover how you can get rid of polymorphous light eruptions.

  2. Polymorphous light eruption is a skin condition in which the presence of too much ultraviolet (UV) or other types of light causes an outbreak of red itchy bumps on a person’s skin The rash occurs most often on the face neck and arms but can be accompanied by additional symptoms such as headaches fatigue and flu-like feelings Because there are a number of ways to treat polymorphous light eruption many people see their symptoms disappear within days or weeks after properly addressing possible risk factors associated with the disorder.

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