The first dry stool and the second dilute and irritable bowel syndrome, enteritis, intestinal tumors have a certain relationship, irritable bowel syndrome will lead to dysfunction of the intestinal system, many patients will be constipated and diarrhea alternately, this kind of patients in the stool will appear the first dry and the second dilute, these people need to change their habits, while regulating the function of the intestine. Some people are caused by the attack of intestinal inflammation, when there is an attack of intestinal inflammation, the intestinal tract will be stimulated by inflammation and peristalsis speed up, so the contents of the intestinal tract will be rapidly discharged from the body, and after the feces are discharged without the disease, the feces will be thin and thick as the main manifestation. Intestinal tumors will affect the function of intestinal system, and patients will have changes in bowel habit when they are sick, and these patients will have diarrhea and constipation alternately during bowel movement, and they should undergo colonoscopy to confirm the diagnosis and timely treatment.