The irregularity of stool is usually caused by the following reasons: a. inflammatory diseases of the colon or small intestine, mainly including Crohn’s disease and ulcerative colitis, as well as familial polyps: b. disorders of intestinal vegetative nerve function, mainly caused by irritable bowel syndrome, which leads to rapid intestinal peristalsis, causing incomplete absorption of water in the stool, resulting in the symptoms of irregularity; c. colon Polyps and malignant tumors of the colon can lead to symptoms of unformed stools, thin stools and blood in the stool. The symptoms can be clarified by proctoscopy, colonoscopy and abdominal CT examinations.