If patients feel fatigue after gastric cancer radiotherapy, they should have less activity and more rest in their free time. The skin of stomach cancer patients will become dry after radiotherapy, so they must protect the skin of irradiated area and do not scratch the skin of this area. During the radiotherapy and within one year of radiotherapy, the area where patients receive radiotherapy is forbidden to be exposed to sunlight, and patients need to consume more food rich in protein and calories in their diet. Radiotherapy is mostly used for gastroesophageal carcinoma in clinic, for the side effects after radiotherapy, it is suggested that patients should take comprehensive treatment according to their own condition and the degree of side effects under the guidance of doctors. The side effects after radiotherapy for gastric cancer mainly include anorexia, dyspepsia, inflammatory reaction of local radioactivity and so on.