Chronic proctitis may lead to unformed stools because intestinal inflammation affects the peristaltic function of the intestines, the balance of intestinal flora, etc., resulting in unformed stools. Chronic proctitis is usually caused by acute proctitis that has been prolonged and transformed into chronic inflammation. Possible causes include radiation exposure, pathogenic microbial infections, medication factors, autoimmune abnormalities, and so on. The main symptoms are gastro-abdominal pain, diarrhea, unformed stools, anal cramping sensation, mucus, pus and blood stools. Due to the long-term inflammatory lesions in the rectal intestinal mucosa, under the influence of inflammatory products, the peristaltic function of the intestines is affected, and it is easy to have the symptom of unshaped stool; in addition, the intestinal flora of patients with chronic proctitis is disorganized, the harmful bacteria increase, and the intestinal internal environment is damaged, which can also lead to unshaped stool. Stool mucus increases, water and other reabsorption may also have obstacles. In summary, chronic proctitis may lead to unformed stools. It is recommended to go to the regular hospital for consultation and treatment if necessary when the symptom of unshaped stool occurs.