Nowadays, radiation therapy has become an important means of tumor treatment. Due to the possibility of radiation injury complications to a certain extent, radiotherapists tend to be conservative in their planning, which affects the effect of radiation therapy for tumors. Once radiation complications occur, due to the lack of awareness of patients and doctors, the treatment cannot be accurate and timely, thus delaying the disease and even causing lifelong disability. The common complications of radiation therapy are as follows: 1, skin and mucous membrane rupture (radiation dermatitis) and chronic ulcers; 2, lymphoma of limbs; 3, nerve damage; 4, rectal blood in stool. The first few can be cured by surgical repair. Most of the blood in stool caused by radiation enteritis can be treated conservatively by specialist drugs. In a word, for tumor patients, the treatment of tumor is fundamental. There are ways to treat all the complications that occur during the treatment process.