Allergic skin itchy and swollen with small blisters can follow the doctor’s instructions for general treatment, medication, such as hydrocortisone ointment and so on. 1. General treatment: first clear pathogenic factors and avoid. At the same time, we should pay attention to local skin cleaning, avoid scratching, avoid hot water burns, wear loose and breathable clothes, eat a light diet, eat more rich fruits and vegetables, do not stay up all night. 2. Medication: glucocorticoid ointment such as hydrocortisone ointment and mometasone furoate ointment can be used externally. Or calcium-modulated phosphatase inhibitors such as pimecrolimus ointment, tacrolimus ointment and other drugs coated. If the itching is obvious, can be combined with oral loratadine, cetirizine and other antihistamines. Allergic skin itchy swollen small blisters, should promptly go to the hospital for examination, and under the guidance of the doctor for standardized treatment, the drug needs to be used in accordance with the doctor’s instructions, can not blindly use the drug.