As for the way of urticaria, there are the following: 1. antihistamine treatment, you can use the 2nd generation non-sedating H1 receptor antagonist cetirizine, loratadine, etc., one effect if not ideal can be combined with two antihistamines. 2. the rash is widespread can be given 10% calcium gluconate 10ml, with vitamin C injection 1.0g intravenously. 3. if accompanied by a certain abdominal pain can be given If the blood pressure decreases and there is difficulty in breathing, oxygen should be given immediately and 0.1% epinephrine should be injected subcutaneously. If necessary, the injection can be repeated within 15 minutes, and intramuscular injection of Benadryl or Chlorpheniramine is needed.