With you, lying on the beach in the sun is a fun vacation or may be exposed to sunlight normal for some people that desire is, sometimes the fear is because they suffer from "sun allergy" ...

Allergy is a condition sun irritated skin under the influence of sunlight. This is a fairly common disease with mild to severe manifestations such as itching, rash, blistering, ... occurring in the skin after exposure to sunlight.

Along with sun exposure but why allergies occur only in some people? Currently it is thought that this problem could be related to the gene. Most people who are allergic to sunlight in the autumn, and the summer sun at the strongest intensity. However, in some severe cases, patients even in winter, even allergic to the light house.

The type of allergy to the sun

There are four types of sun allergies. First rashes polymorphisms after exposure to the sun a few minutes to several hours. Originally appearing rash, rash with white or yellow pattern on the red inflammation. The flattened array can develop a large number of cases are called "sun poisoning". Symptoms will disappear after a period of exposure to the sun and this is the most common form of sun allergy, usually occurs during autumn.

Photochemical pruritus usually occurs in children or young adults. Symptoms include itchy patches on the skin papules spread to all areas not exposed to sunlight. The nodules can then ulceration of edema, liver damage, even causing the cracks on the lips, cheeks, neck, arms, and can leave scars. In general, the symptoms appear in summer and decreasing at fall.

Photochemical dermatitis is chronic inflammatory papules dry patches, itching on the skin surface. Location lesions usually appear on the face, scalp, neck, spine, half on the chest, back arms, hands. Between the injuries may have normal skin and sometimes symptoms appear in the palm or legs. Manifestations of chronic dermatitis photochemical expression was similar to that of contact dermatitis should sometimes lead to misdiagnosis.

Stock urticaria due to sun started happening after a few minutes exposure to sunlight. Damage to the skin is the array rashes, itching and blisters. This type of damage both the skin and not exposed to sunlight. Type allergic to sunlight is common in middle age and progresses better after stopping exposure to the sun.

Causes and risk factors

Why the sun can cause allergies? Scientists say the ultraviolet sunlight is the culprit. When ultraviolet rays penetrate the skin damage cells and alter the properties of a number of proteins in cells. The protein, after being modified physicochemical properties will become "strange protein" or antigens to the body.

Therefore, the body's immune system will produce antibodies to fight and allergic reactions occur. Some drugs, chemicals (such as shampoo, chemical treatment for cancer ...) or medical conditions such as lupus erythematosus system can increase the sensitivity of the skin to light, aggravate or produce current status of allergy to sunlight.

Some risk factors for allergic to sunlight, including race (Caucasians are as allergies or sun original polymorphic type, while the photochemical evidence or pruritus occurred in native America) in contact with a number of cosmetics, antiseptics before exposure to the sun, some drug use may also increase the risk of allergy to the sun, such as anti-inflammatory drugs pain, the tetracycline antibiotics ... the risk of allergy to the sun will rise if the patient had a history of contact dermatitis or family siblings have allergies to the sun.

Treatment and prevention

Treatment by sun allergy medication use groups including corticosteroids and topical forms of oral antihistamines as well as when they have symptoms. You can use ultraviolet lights at the risk of skin exposed to the sun for the skin used to the sun.

Preventive measures include avoiding direct exposure to sunlight, always avoid dry skin using creams appropriate, using measures such magnificent sun wearing sunglasses, wearing sunscreen right ... when you go out. When symptoms are manifestations of allergy to the sun, you need a medical facility for examination and specific advice on how to prevent this disease.