Different treatments are adopted according to different causes of coma in advanced stage of gastric cancer with coma. 1. Hypoglycemic coma: giving patients infusion of liquid with high sugar can quickly correct hypoglycemic coma. At the same time, patients should be instructed to prepare foods that can rapidly raise blood sugar, such as sugar cubes, chocolate, and so on. When there is a sign of hypoglycemic attack, it can quickly replenish blood sugar to prevent the occurrence of coma. 2. Hepatic coma: remove the triggers leading to hepatic coma, and at the same time give monosodium glutamate to reduce blood ammonia and alleviate the symptoms of coma. 3. Central nervous system: for coma caused by central nervous system lesion, mannitol and diuretics can be given to reduce cranial pressure by dehydration, so as to alleviate the symptoms. In the late stage of stomach cancer, patients should pay more attention to rest and avoid some strenuous activities. Moreover, in the late stage of stomach cancer, there may be some complications, such as headache, nausea, vomiting, etc., so some symptomatic treatments can be taken to alleviate the symptoms. If the patient has stomach cancer with coma in the late stage, it is recommended to consult doctor in time, ask the doctor to clarify the cause of the disease and give targeted treatment.