The hot and humid summer climate makes it a high season for all types of dermatitis, especially for some allergic people whose skin is easily affected by the external environment. What is allergic dermatitis? Allergic dermatitis is a skin condition in which the body is exposed to certain allergens that cause skin redness, swelling, itching and peeling. Specific allergens can be divided into four categories: contact allergens, inhalant allergens, ingestive allergens and injectable allergens. Common allergic dermatitis in summer The manifestation of dermatitis is generally nonspecific, but the form, extent and severity of dermatitis occurring varies depending on the exposure, the mode of exposure and individual reaction. In summer, the following types of allergic dermatitis are common: solar dermatitis Solar dermatitis is a common allergy to ultraviolet light from the sun that occurs in summer. Symptoms: erythema, papules, blisters or hypertrophy of the skin, and self-induced itching. Characteristics: Mainly distributed on exposed areas such as face, neck and back of hands, usually appearing a few hours or days after sun exposure. Cosmetic dermatitis Cosmetic dermatitis is a skin disease caused by cosmetic irritation or allergy. Symptoms: Erythema, papules, blisters and oozing in severe cases, and conscious itching. Characteristics: Commonly found on areas of the face where cosmetics are used, relieved by discontinuation of use, and recurring with reuse. Contact dermatitis Contact dermatitis is an inflammatory reaction that occurs at the site of contact or even beyond after single or repeated contact with exogenous substances on the skin or mucous membranes. Symptoms: manifests as erythema, swelling, papules, blisters and even macules. Characteristics: Acute dermatitis with clear boundaries occurring suddenly at the contact site or exposed parts of the body, and the rash is mostly of a single form. Allergic dermatitis treatment principles and medication 1, avoid stimulation Avoid re-exposure to allergens that can cause allergies; avoid scratching or scalding with too hot water, avoid strong sunlight stimulation. 2, systemic treatment less severe symptoms can be oral antihistamines, vitamin C and calcium; severe cases can be hydrocortisone or dexamethasone intravenous drip, and after the symptoms are reduced, oral maintenance. 3.Local treatment Local treatment is very important and should be treated separately according to clinical manifestations. For example: Acute stage: you can choose to use furnace glycolate lotion to reduce swelling and itching of the skin, astringent anti-infection; subacute or chronic stage: you can apply topical corticosteroid ointment (such as 999 dermatoprene – mometasone furoate gel, etc.) to stop itching and reduce skin exudation. Warm tip: specific medication please combine with clinical, by the doctor face-to-face guidance shall prevail.