Most of the reactions of red bumps after New Crown vaccination are transient in nature and generally do not require special treatment and can subside on their own after a few days. However, like other vaccines, some common adverse reactions may occur after vaccination, such as soreness, pain, redness, swelling, itching and even red bumps at the vaccination site, and a few people may experience fever, fatigue, nausea, headache, muscle pain, diarrhea, etc., which usually recover on their own after 2-3 days without special treatment. Some people may experience coincidental reactions after vaccination, which means that the vaccine recipient is in the incubation period or the early stage of the disease during the vaccination process, and the vaccination causes the symptoms of the original disease to appear, and the symptoms of red bumps on the skin may appear. If the symptoms are accompanied by other symptoms or if the red bumps are serious, it is recommended not to take anti-allergy medication on your own, but to go to the hospital in time to clarify the cause of the disease and to provide timely and correct treatment and care of the skin tissue.