The main harmful effects of eating too many persimmons are gastrointestinal discomfort, elevated blood sugar, obesity, and gastric persimmon stones. 1. gastrointestinal discomfort: eating too much is easy to diarrhea and other gastrointestinal symptoms. 2. Elevated blood sugar: persimmons contain too much sugar, especially diabetic patients, if the usual diet management is not good, blood sugar control is not stable, a large number of persimmons is easy to cause elevated blood sugar. 3. Obesity: eat persimmons in moderation generally does not cause obesity, but if you do not control, often eat a lot of persimmons, and did not carry out the relevant sports, persimmons in the formation of carbohydrates in the body of the calories will be accumulated, easy to increase the risk of obesity. 4. Stomach persimmon stone: the lower the maturity of the persimmon, the higher the content of ellagic acid, and ellagic acid, this substance and stomach acid combination, easy to promote the food residue, dietary fiber and pectin precipitates and other substances such as adhesion, caused by the occurrence of gastric persimmon stone. Generally often empty stomach, eat a lot of unripe persimmons, more likely to occur persimmon stone. Ripe persimmons, eat in moderation is not harmful to the human body, but to grasp the degree, so as not to cause adverse effects on health. If you feel unwell after eating persimmons, seek medical attention.