There is no stool but the mucus discharge is generally abnormal, the possible causes are inflammatory bowel disease, gastrointestinal dysfunction, intestinal obstruction and so on. 1. Inflammatory bowel disease: due to the invasion of inflammatory foci, the mucosal absorption function is impaired, the stool habit is abnormal, stimulate the defecation center, the intestinal discharge of inflammatory mucus, may also be accompanied by mucus blood stool. 2. Gastrointestinal dysfunction: also known as gastrointestinal neurosis, mainly manifested as acid reflux, anorexia, dyspepsia, fecal changes and so on. Due to the abnormal function of intestinal digestion and absorption, it can be manifested as mucus-like stool. 3. Intestinal obstruction: usually caused by intestinal tumors, polyps, ischemia of the intestinal wall and other obstructions, obstruction of fecal discharge, resulting in only a small amount of mucus discharge during defecation. If there is no stool but mucus is discharged, it is recommended to go to the regular hospital in time to find out the cause and treat it actively.