Prunes are delicious and nutritious, rich in vitamins, fiber, minerals, sugars and many antioxidant components. Although prunes are good, but not everyone is suitable for consumption, such as diarrhea patients, peptic ulcer disease patients, diabetes, hyperkalemia patients should not eat. 1, diarrhea patients: prunes are rich in a certain amount of dietary fiber, which helps promote gastrointestinal peristalsis, promote digestion, soften the intestinal stool, so diarrhea patients should not eat, so as not to increase the number of bowel movements; 2, peptic ulcer patients: prune pulp is sour and sweet, which contains citric acid, malic acid and other organic acids can stimulate the secretion of gastric acid to increase the ulcer surface. It contains citric acid, malic acid and other organic acids, which can stimulate increased gastric acid secretion, which is detrimental to the recovery of the ulcer surface, thus aggravating the symptoms of peptic ulcer; 3, diabetic patients: prunes contain a large amount of sugar, which is detrimental to diabetic patients, and diet therapy is a basic measure to prevent and control diabetes, so diabetic patients should not eat prunes; 4, hyperkalemia patients: prunes are rich in potassium. Rich in potassium, hyperkalemia patients after consumption, to a certain extent, will affect the body’s blood potassium level, so hyperkalemia patients should not eat. In addition, the consumption of prunes is not recommended to drink tea at the same time, because the iron in prunes and tannic acid in tea will affect the absorption of iron.