The stool is a one by one this situation indicates that the stool is dry, the causes of dry stool are the following kinds. First, is the diet, if you eat food too fine or too greasy, while the intake of food rich in coarse fiber is not enough to fine grain-based too fine food into the large intestine, the large intestine will easily over-absorb the water in the food, will cause the lack of water in the stool, thus dry, the formation of a grain, this situation to adjust the diet structure in a timely manner, pay attention to eat more coarse fiber-rich This situation should promptly adjust the diet structure, pay attention to eat more crude fiber-rich food. Second, is the intestinal tract cause of certain diseases, such as polyps, inflammation, etc., will cause the normal function of the intestinal tract disorder, so that the food in the intestinal tract stay too long, the water in the stool is excessively absorbed by the intestinal tract, the stool is seriously dehydrated, it will form dry, resulting in a one of a kind. This situation is best to go to the hospital for examination, symptomatic and timely regulation of intestinal disorders.