What is sun allergy and what can you do about it?

Sun allergy, also known as polymorphic light eruption (PLE), is a reaction of the skin to exposure to sunlight. It is often caused by a hypersensitivity reaction of the immune system to ultraviolet (UV) radiation from the sun.

Some people have a genetic predisposition that makes them more sensitive to sun allergy. If family members have a sun allergy, you are more likely to get it yourself.

Repeated exposure to UV radiation can lead to an overreaction of the immune system. This mainly occurs in people who suddenly spend a lot of time in the sun without their skin getting used to it.

Some medications can increase the skin's sensitivity to sunlight, such as antibiotics, diuretics and some antidepressants. People with lighter skin have a higher risk of sun allergy because their skin has less melanin, the pigment that protects against UV radiation.

A weakened immune system may also play a role in the development of sun allergy. This can happen, for example, in people with certain autoimmune diseases or who take immunosuppressive medications.

The symptoms of sun allergy vary but may include redness, itching, bumps or blisters on the skin that occur within hours to days after exposure to sunlight. The best way to prevent sun allergy is to limit exposure to direct sunlight, wear protective clothing and use sunscreen with a high SPF.

Author: Prof. Dr. Dirk Devroey - Latest update: 0000-00-00 - Copyright: Clinifacts 2024