The stool is always very thin and is associated with intestinal tumors, intestinal polyps, constipation, and intestinal dampness and heat. Some people have fine stools all the time, which is considered normal if there are no other symptoms. However, for some people who have been having thicker stools and found to have thinner stools within a short period of time, it is considered to be caused by diseases in the intestinal tract, and more common are malignant tumors in the intestinal tract. The tumor grows faster and presses on the rectum, causing narrowing of the intestine and resulting in thin stools. Some patients have polyps in the intestinal tract, which can cause obstruction when passing stool, so they may also have thin stool. Due to the lack of water and dryness in the intestine, it is difficult to discharge stool, and a layer of stool will be formed to adhere to the intestinal wall, resulting in the relative narrowing of the intestinal cavity and thin stool performance. In addition, long-term poor dietary habits, often eat spicy, irritating food can easily lead to intestinal damp heat, intestinal damp heat does not disperse, diarrhea will not be clear, the feces will appear sticky performance, so this symptom will also appear.