When cephalosporin is found to be allergic to rash, the infusion must be terminated immediately, and the medicine and infusion tube should be sealed and sent for examination together. At the same time, depending on the severity of the allergic symptoms, appropriate treatment measures should be taken. If there is only a local rash, you can immediately take medication for symptomatic treatment by taking oral antihistamine paracetamol or loratadine tablets together with vitamin C tablets, and at the same time using glyburide lotion or glucocorticoid cream to relieve the rash and relieve itching. If there is a large rash and itching with respiratory distress, oxygen must be administered immediately, along with epinephrine, dexamethasone, and intramuscular promethazine injections.