Allergic dermatitis often occurs after contact with allergens. It should be detached from the allergens in time to avoid re-exposure, and general treatment and medication should be taken to alleviate the symptoms. 1. Disengage from allergens: After the occurrence of atopic dermatitis, it is necessary to disengage from the environment in time and actively search for allergens, such as inhalation allergy, ingestion allergy, contact allergy, etc., to avoid re-exposure. 2. General treatment: atopic dermatitis often occurs in different degrees of itching, redness, swelling, tingling, etc., should avoid scratching, to prevent the skin from breaking out and becoming infected. 3. Medication: If the lesions are limited in scope, topical glucocorticosteroids such as mometasone furoate ointment can be used to reduce the local inflammation; if the itching is obvious, oral antiallergic drugs such as loratadine can be used to alleviate the symptoms. For systemic generalized, severe allergic symptoms, if necessary, systematic use of glucocorticoid drug therapy, such as intravenous methylprednisolone. In short, the occurrence of atopic dermatitis should be timely to the hospital, under the guidance of the doctor for treatment, the specific use of drugs need to follow the doctor’s instructions.