Radiotherapy and chemotherapy are the two major treatments commonly used for patients with malignant tumors. The recovery time after radiotherapy needs to be judged according to the patient’s physical condition and daily care, and should be analyzed in a specific way, not to be generalized. For early stage tumor patients with good physical condition, the recovery period is relatively fast, generally about 1 week, because the side effects after radiotherapy are light or not obvious. For patients with advanced tumors, systemic side effects such as wasting, drowsiness and weakness may occur during radiotherapy. Most of them appear several times at the beginning of radiotherapy, and then may improve on their own, or improve or disappear immediately after the cessation of radiotherapy. Some patients may experience side effects for several months or even a year after radiotherapy before they gradually disappear. It takes time for normal tissues to repair after irradiation after radiotherapy. During this period, patients need to pay attention to avoid irritating the radiotherapy area and pay attention to skin protection to avoid infection. In addition, patients should enhance nutrition to promote the body’s recovery as soon as possible.