During immunotherapy, a light diet and balanced nutrition are generally recommended. Immunotherapy refers to the treatment of disease through the action of the body’s internal immune system. When the body is in an abnormal state of immunocompromise or hyperimmunity, the immune function can be effectively enhanced or suppressed through human intervention, so as to treat the disease, commonly including tumor immunotherapy. For people using immunotherapy, it is generally recommended to eat a light diet, and also pay attention to the nutritional balance of the diet and easy to digest. Individuals should also be careful to stay away from foods that cause allergies in the body. Whether individuals use immunotherapy or other treatments, they need to do a good job of dietary care and health care during the treatment period, so as not to affect the treatment of the disease due to improper diet.