Gastric cancer patients often have tumor low fever, which is caused by tumor necrosis, of course, infection, treatment and other reasons can not be excluded. 1. Gastric cancer is a relatively common malignant tumor in clinic, due to the relatively large tumor load and insufficient blood supply to tumor tissues, which often leads to ischemic necrosis of tumor cells, causing absorption of heat from necrotic cells, and the patient will show persistent low and moderate fever, and at this time, it is necessary to take active anti-tumor treatment. 2. Gastric cancer patients are often accompanied by decreased immunity, and bone marrow inhibition is often caused by chemotherapy targeting and other treatments, which leads to patients being more susceptible to infections and fever, and then they need to be actively treated with anti-infections. It is suggested that patients should consult the doctor in time, improve the examination to clarify the cause of fever and then treat the symptoms actively to avoid delaying the condition.