There is a piece inside the anus which is very hard and painful when touched may be caused by hemorrhoids, perianal abscess, rectal cancer, anal cancer and other reasons. 1. Hemorrhoids: prolonged consumption of spicy, stimulating food, constipation, sedentary or standing causes abnormal expansion of blood vessels in the anal area, thus forming hemorrhoids, generally there is a hard lump in the inner anus for internal hemorrhoids, such as accompanied by erosion and inflammation, there will also be a pain when touching the symptoms. 2. Perianal abscess: in most cases, it is due to suppurative infection in the soft tissues around the anus and rectum and the interstitial space, resulting in local abscess and pain, which can be manifested as a piece of hardness inside the anus, and the symptom of pain when touched. 3. Rectal cancer: If there are malignant tumors on the mucosa of rectum caused by prolonged irregular diet and inflammation of intestines, and the rectum is close to the anus, it will lead to the symptom of a hard and painful piece inside the anus. 4. Anal cancer: due to the lesions around the anus caused by warts, scar, suppurative infection, hemorrhoids and other chronic inflammation for a long period of time, which can cause itching around the anus, local lump or accompanied by ulcers, bleeding, pain and other phenomena, it is possible that there is a piece of hardness inside the anus, and it is painful to touch it. Caused by a piece of hardness inside the anus, a touch of pain causes, in addition to the above, there may be other factors, it is recommended to go to the hospital in a timely manner for examination, follow the doctor’s instructions to give a clear diagnosis of the formal and reasonable treatment to avoid delays in the condition.