The side effects of tumor immunotherapy are as follows: 1, skin rash: its occurrence ratio is relatively high. 2, abnormal thyroid function, cardiotoxicity, hepatotoxicity and other immune-related special reactions. It is suggested that patients do not need to worry too much. In the process of immunotherapy, they should go to professional medical institutions and under the guidance of professional doctors. Standardized treatment can distinguish whether some of the listed adverse reactions are caused by immunotherapy and should be handled accordingly in a timely manner.