Drug allergy rash generally refers to drug rash, the treatment of drug rash is general measures, drug treatment. 1. General measures: patients with drug rash need to stop using suspected allergy-causing drugs in time, and drink more water to accelerate drug excretion. At the same time, need to strengthen the local skin care, can be given in the lesions oozing wet compresses, regular rinsing, to avoid infection. If the cumulative oral cavity need to gargle more, strengthen the clean. Need to ensure sufficient rest time, avoid overwork, can quit smoking and alcohol. 2. Drug therapy: patients with mild symptoms of drug rash can take oral antihistamines under the guidance of a doctor, such as loratadine, cetirizine, or oral vitamin C and other vitamin drugs. For patients with severe drug rash, oral or injectable glucocorticosteroids, such as dexamethasone, betamethasone, etc., should be prescribed by the doctor. Once diagnosed with drug rash, patients need to go to regular hospitals and actively cooperate with doctors to take relevant treatment measures to avoid delaying the condition. At the same time, the patient should follow the doctor’s instructions for regular checkups in order to understand the recovery of the body.