What is allergic dermatitis

When spring comes, the spring began to haunt dermatitis, and many people, faces a large red knots, eyelid edema, twinge skin, and even have itchy scalp. Medical experts said that the early spring of allergic dermatitis is a good season. Eat seafood allergies, food poisoning, eating the wrong medicine, which can cause skin allergies. In addition, allergic to the environment, the mentality of allergic (nervous tension), which also can cause allergic dermatitis factors. Cause allergic dermatitis is a result of many factors leading to the inflammatory response of the skin. Common allergic dermatitis mainly two types : contact dermatitis and cosmetic dermatitis. Different factors causing the allergic reaction caused by different. Contact dermatitis is a skin or mucosal tissues exposed to certain foreign substances after stimulation of the skin caused by acute inflammatory reaction. Its causes can be divided into two major categories : primary stimulus, mainly by the strong acid and alkali, Mylabris and some strong stimulation or greater concentration of chemical substances cause. Such individuals without selectivity, without latency, any contact with the skin can cause immediate acute inflammation; allergic reaction (anaphylaxis), which is the main type of delayed-type hypersensitivity (allergic-type vI). Is exposed to certain stimulating factor (allergens) on the skin and mucous membranes. Only a few have specific Allergies of the disease, the initial contact is not immediately after the incidence, often 4 -20 days after the incubation period (an average of 7-8 days) so that the body first allergens, such as exposure to the material again, in around 12 hours (normally not more than 72 hours) can happen dermatitis. Allergic reactions such contact dermatitis is the most common. Cosmetics caused by inflammation of the skin, known as dermatitis cosmetics. Some people often use some kind of cosmetics, once again used the suspension or allergic reaction will occur; It was also the first time that the Department of behind develop allergies; What is the use of light after a day of drying and react. Most patients in the use of cosmetics hours after which an allergic reaction, This medical-called immediately (or rapid-onset) allergic reactions; occurred a few days after an allergic reaction is known as delayed response. Generally more immediate reaction. Cosmetics only mild dermatitis skin itching, a small scattered red papules, mild erythema and swelling, severe local skin edema, diffuse erythema, ranging from the size of water scar, or even fluid erosion.