Urticaria infusion can be good for a few days, generally urticaria infusion is only acute urticaria infusion, acute urticaria symptoms are very serious, can be manifested as a large number of erythema all over the body and intense itching, relying on drugs alone can not control this rash must be infused, infusion is generally infused five to seven days to completely control the rash, and will not recur after stopping the drug, in the course of infusion can be gradually seen every day even if there is a During the infusion process, you can gradually see that even if there is a new rash every day, it is less than yesterday’s rash, and every day the rash becomes less and less and eventually it will completely subside after stopping the medication and no new rash will appear. At the same time, the infusion must be strong enough that the dose of the drug is not too small, and the small dose cannot control the occurrence of the rash, but must be sufficient and a full course of treatment.