The survival time of most patients with advanced gastric cancer who cannot eat is about three months, and the exact survival time needs to be determined according to the recovery status of the patient’s body and the development of the disease. In the case that the patient cannot eat, nutrients can be input through intravenous injection. The psychological state of the patient is also very important. Patients should not give up the hope of survival and give up the treatment because of advanced cancer, and a good state of mind is crucial to the patient’s recovery. Various organs of the patient will be affected when the cancer spreads to an advanced stage, and the patient may feel very painful. If necessary, the patient can prolong the life cycle by injecting pain medication to relieve pain and cooperating with the doctor’s treatment.