The time to heal from vaccine-induced urticaria is related to the severity of the urticaria. It is a systemic allergic reaction that occurs mainly due to drug factors that cause dilation and increased permeability of small blood vessels in the skin and mucous membranes. The clinical manifestations are scattered or patchy red bumps all over the body, occurring suddenly, usually accompanied by fever, joint pain, swollen lymph nodes and other symptoms. 1. When the symptoms are mild: If a small amount of rash appears after vaccination, it can generally be cured in about 7 days, during which time it is necessary to pay attention to rest, keep indoor air fresh and drink more water. 2. When the symptoms are severe: If the rash around the body is heavy, causing breathing difficulties, gastrointestinal discomfort, etc. Symptoms need to be regulated by the use of anti-allergy drugs under the guidance of a doctor, which generally requires treatment for about 1 month. The application of hormones, if necessary, can effectively improve the symptoms of hives and facilitate the recovery of patients. In daily life, patients with urticaria should pay attention to eating more easily digestible food and fresh fruits and vegetables in their diet to supplement vitamins and promote recovery from the disease. When hives recur, they can also be treated with Chinese herbal medicine under the guidance of a doctor, such as the use of some drugs to clear heat and dispel wind, remove dampness and relieve itching, to help patients better regulate.