Patients with advanced pancreatic cancer can eat watermelon. This is because many patients with advanced pancreatic cancer experience liver metastasis. Cancerous tissues damage liver cells, leading to impaired liver function and abnormal glycogen metabolism. Many patients may experience episodes of hypoglycemia, and eating watermelon can help replenish blood sugar, which is beneficial for the patients. Additionally, many patients with advanced pancreatic cancer suffer from a decline in appetite, and watermelon can stimulate their appetite and increase their food intake, which is also beneficial for their recovery. Thirdly, watermelon has a certain diuretic effect. Since many patients with advanced pancreatic cancer also suffer from hypoproteinemia, they are prone to edema. Eating watermelon can promote an increase in urine output, thereby helping to alleviate edema.