Persimmons should not be eaten on an empty stomach, but after meals 1 hour. Because persimmon contains more tannic acid and pectin, it will form lumps of different sizes under the action of gastric acid on an empty stomach. If these masses cannot reach the small intestine through pylorus, they will stay in the stomach and form gastric persimmon stones. Small belly persimmon stones are like apricot stones at first, but they will accumulate more and more. If the stomach persimmon stone cannot be discharged naturally, it will cause digestive tract obstruction, severe pain in the upper abdomen, vomiting and even hematemesis. A fist-sized stomach persimmon stone was found during the operation. If the stomach has a "bottom", the formation of stomach persimmon stone can be avoided. In addition, persimmons should not be eaten with high-protein crabs, fish, shrimps and other foods. In traditional Chinese medicine, crabs and persimmons are cold foods and cannot be eaten together. From the point of view of modern medicine, high-protein crabs, fish and shrimps are easy to solidify into blocks under the action of tannic acid, that is, stomach persimmon stone. Persimmons can't be eaten with sweet potatoes and spinach. Persimmon contains tannin, which is easy to combine with iron, thus hindering the absorption of iron in food, so anemia patients should eat less. Diabetics should not eat persimmons, because persimmons contain 10.8% of sugar, and most of them are simple disaccharides and monosaccharides (such as sucrose, fructose and glucose), which are easily absorbed after eating, and make blood sugar rise. It is more harmful to people with diabetes, especially those with poor blood sugar control. People with chronic gastritis, delayed emptying, dyspepsia and other low gastric motility should not eat persimmons after subtotal gastrectomy.