Allergic dermatitis is a skin disease caused by allergens, mainly refers to the human body in contact with certain allergens and cause skin redness, swelling, itching, doughnuts, peeling and other skin conditions.

Specific allergens can be divided into four categories: contact allergens, inhalant allergens, ingested allergens and injected allergens. Each type of allergen can cause corresponding allergic reactions, the main manifestations are a variety of dermatitis, eczema, urticaria

Can be used externally Ling skin cream can be used, the folk are also used to "eight dry wood" branches, boiled liquid fumigation. Eight dry firewood is characterized by the outer skin dry and rough, angular edge.