Frequent urination, urinary urgency, incomplete urination, and anal swelling are mainly caused by diseases, and common diseases include chronic prostatitis, ureteral stones, and prostate hyperplasia. 1. Chronic prostatitis: When inflammation of the prostate occurs due to bacterial or other microbial infections, it can cause pain and dysfunction in the prostate area. The main clinical manifestations are recurrent burning sensation in the urethra, urinary frequency and pain, perianal swelling, and change in bowel habits. 2. Ureteral stones: when kidney stones fall into the end of the ureter causing obstruction, the stones will stimulate the anus and the abdomen and other parts of the body so that a series of symptoms such as urinary frequency and pain, abdominal pain, rectal irritation, anal swelling and so on. 3. Prostatic hyperplasia: Prostatic hyperplasia usually refers to benign prostatic hyperplasia, benign prostatic hyperplasia is a common disease in middle-aged and old people. With the increase in the size of the prostate, obstruction aggravated by the bladder’s effective urine capacity is reduced, resulting in frequent urination, urinary urgency, urinary symptoms, prostate hyperplasia will also oppress the rectum, resulting in a feeling of anal swelling. Patients should go to the hospital immediately when they feel unwell.