Allergic dermatitis usually takes about one week to half a month to recover, depending on the patient’s actual condition, personal constitution, condition recovery and other factors. If the actual condition of the patient with atopic dermatitis is good, personal constitution is good, the condition of the recovery is good, generally need about a week to recover. When atopic dermatitis patients have poor personal constitution, fail to actively cooperate with the treatment, etc., it usually takes about half a month or even longer to recover. Allergic dermatitis may be caused by allergens irritating the skin, not paying attention to skin cleansing, etc. It usually shows symptoms such as pimples, blisters and maculopapulars, and can be treated with medicines such as cotrimoxazole acetate solution, cetirizine, loratadine, etc., under the guidance of a doctor. If you suffer from allergic dermatitis, it is recommended to visit the hospital in time and standardize the treatment under the doctor’s guidance.