Feces can be seen at the anal opening and cannot be discharged, which may be caused by constipation, rectal cancer and perianal diseases. 1. Constipation: feces accumulates in the intestinal tract, and the intestinal tract absorbs water in feces repeatedly, which easily causes dry feces and difficult to discharge. 2. Rectal cancer: Rectal cancer tumors mostly protrude into the intestinal lumen, which will hinder the discharge of feces, and if the cancer is large, the feces will be more difficult to be discharged. 3. Perianal diseases: for example, circumferential hemorrhoids, perianal abscess and other diseases will hinder the discharge of feces, so there can be the symptom that the feces can be seen at the anal opening and cannot be pulled out. It is recommended to go to the hospital for colonoscopy and diagnosis in time, and then treat the disease in the appropriate way, for example, rectal cancer should be treated by surgery.