The conditions that may occur 1 month before the terminal stage of gastric cancer include severe pain, large amount of ascites, liver function abnormality and malignant disease. 1. Severe pain: most patients with advanced malignant tumors will have persistent severe pain, and many patients need to take strong analgesic drugs for a long period of time, especially when the tumor invades the abdominal nerve plexus or develops bone metastasis, the pain is more obvious. 2. Large amount of ascites: gastric cancer in advanced stage can have extensive abdominal metastasis and peritoneal metastasis, which will result in the formation of large amount of ascites, manifesting as abdominal distension, dyspnea, etc. The fluid extracted from peritoneal puncture will mostly be bloody fluid. 3. Abnormal liver function: gastric cancer is prone to liver metastasis, which will seriously damage liver function and cause a series of manifestations, such as jaundice, edema, malnutrition, bleeding tendency and so on. 4. Malignant disease: gastric cancer patients have serious malnutrition in late stage due to difficulty in eating, and malignant tumor itself is a consumptive disease, so patients have serious wasting and even malignant disease before death. The specific performance varies from person to person. For serious cases, it is recommended to actively seek medical treatment.