Indigestion does not make you fat, but can cause diarrhea, constipation, anemia, stomach discomfort, etc. Indigestion is mainly caused by organic and functional problems, patients will have stomach discomfort, loss of appetite, etc. When indigestion occurs, the intake of food can not be digested and absorbed by the body, so it will not cause the body to gain weight. Indigestion will cause insufficient secretion of gastric acid and pepsin, and poor digestion and absorption in the small intestine will lead to diarrhea. If you often eat spicy, fried, high-fat, high-protein food in the diet, the digestion and absorption of the intestine is slower, and these foods will accumulate in the intestine for a long time causing patients to have constipation. In addition, long-term malnutrition will also affect the absorption of food, will cause the body to appear anemia, and will lead to a variety of chronic gastrointestinal diseases, common gastric ulcer, duodenal ulcer, chronic colitis, so there will be stomach discomfort.