Symptoms caused by the third booster shot, that is, the adverse reaction of the vaccine, can be divided into local reaction and systemic reaction. 1. Local reaction: mainly after vaccination, it is easy to cause redness, swelling, pain and hard nodules at the site of vaccination, but usually it only takes two to three days to automatically relieve the symptoms, you can use hot water to promote local blood circulation to speed up, which will help to alleviate the above symptoms of discomfort. 2. Systemic reaction: mainly fever symptoms are more common, usually low fever, can be relieved by ice on the forehead and alcohol rubbing the body, etc., if necessary, you can also take oral antipyretic drugs, such as ibuprofen or acetaminophen. In addition, vaccination, there are often certain contraindications, it is recommended to consult a specialist before vaccination; the application of the above drugs, with certain risks, need to be taken under the guidance of a specialist.