Dermatitis can be divided into atopic dermatitis, contact dermatitis, solar dermatitis, etc., if the dermatitis recurrence needs to be directed at the cause of the drug treatment, physical therapy, and general measures to regulate. 1. Atopic dermatitis: If patients with atopic dermatitis need to be coated with mometasone furoate cream, dexamethasone ointment and other glucocorticosteroid ointment under the guidance of a doctor, or follow the doctor’s instructions for oral azathioprine, methotrexate and other immunosuppressants. In addition, patients can also be in the narrow-spectrum medium-wave ultraviolet irradiation treatment. 2. Contact dermatitis: patients with contact dermatitis can also take oral loratadine, cetirizine and other antihistamines under the guidance of a doctor, for patients with serious conditions, oral prednisone, methylprednisolone and other glucocorticosteroids under the guidance of a physician. Patients need to clarify the allergens in a timely manner to reduce the chances of exposure to allergens. 3. Solar dermatitis: Tacrolimus ointment, pimecrolimus cream and other calcineurin inhibitors can be applied as prescribed by the doctor. Patients usually need to pay attention to sunscreen when going out, you can apply sunscreen or wear sunscreen clothing. It is recommended that when dermatitis recurring need to consult a doctor to check the type of dermatitis, the doctor will choose the appropriate measures for the type of dermatitis treatment.