Green feces with mucus may be due to indigestion, chronic colitis, ulcerative proctitis and so on. 1. Dyspepsia: dyspepsia is an abnormal digestive function due to various reasons, diarrhea and abnormal bowel movements are common symptoms. If patients eat green food that is difficult to digest, it may lead to green feces with mucus during bowel movements. 2. Chronic colitis: a disease related to intestinal immune imbalance, caused by long-term chronic inflammation in the colon and intestinal tract, common symptoms include recurrent diarrhea, abdominal pain, mucus, pus and blood stools, etc., and green mucus-like feces may appear in the bowel movement. 3. Ulcerative proctitis: it is an ulcerative inflammation that occurs in the rectum, and patients may have green mucus stools, mucus and blood stools. There may be other reasons for the green color of the stool with mucus, so you can go to the hospital to complete the relevant examinations to clarify the situation.