The common reasons for patients to have unformed stool with anal swelling are mainly the following: 1. Rectal tumor, tumor cells invade to the whole layer of rectum, which can cause intestinal stenosis, and patients have obstructed stool excretion, manifested as unformed stool and swelling feeling. If the patient is in good health, it is recommended to perform radical surgery for rectal malignant tumor, which can completely solve the symptoms of unformed stool and anal swelling and prolong the patient’s life. If the patient is in poor condition, he can consider the method of endorectal stent drainage to relieve the intestinal obstruction; 2. mixed hemorrhoids, mixed hemorrhoids serious patients can cause the nucleus of hemorrhoids repeatedly protrude outside the anus, which will cause anal outlet obstruction, unformed stool and anal swelling, it is recommended that patients perform surgery to remove the nucleus of internal hemorrhoids and peel off the varicose blood vessels of external hemorrhoids to achieve better treatment results.