Anal swelling always want to defecate but only a little bit each time, not clean bowel movements, may be caused by intestinal inflammation, intestinal tumors, or only by intestinal dysfunction. 1. Bowel inflammation such as ulcerative colitis, Crohn’s disease, etc. can lead to impure defecation, anal distension, rectum or colon is more common. Anal sinusitis is also a common cause, manifested by anal sinus area pressure, congestion, redness and swelling. 2. benign and malignant tumors of intestines, especially tumors growing in the rectum, when it grows bigger, it will affect the function of defecation. Timely surgery should be carried out to remove the mass, and pathology biopsy should be carried out in time, if it is malignant tumor, lymph node clearance of the surrounding tissues should also be carried out to avoid metastasis and recurrence of the disease. 3. Intestinal dysfunction without organic lesions can also lead to anal swelling, defecation, without special treatment, pay attention to diet and regular work and rest, generally able to recover on their own. It should be noted that, if the above symptoms are aggravated and not relieved, the patient should go to the hospital in time to get a clear diagnosis and treatment as soon as possible, so as to avoid aggravation of the condition.