Prostate swelling and pain may be caused by prostatitis, prostate cancer, bladder stones and other reasons. 1. Prostatitis: it can be caused by pathogenic bacterial infection or certain non-infectious factors, and patients may experience clinical manifestations such as pain and discomfort in the pelvic region, abnormal urination, and sexual dysfunction. It may make the patient suffer from prostate swelling and pain. 2. Prostate cancer: it refers to the malignant tumor occurring in male prostate, early stage patients mostly have no obvious symptoms, late stage may show symptoms such as abnormal urination, abnormal urodynamics, blood in semen, erectile dysfunction, discomfort in pelvic region, bone pain and so on. As the tumor grows, it may cause the patient to have prostate swelling and pain. 3. Bladder stones: Patients with bladder stones often experience lower abdominal pain, which is more obvious during urination, and the pain may also radiate to the pubic area and the head of the male penis, which may also lead to prostate swelling and pain. Prostate swelling pain may also have other causes, such as prostate hyperplasia, etc., it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment, do not take medication without authorization, so as not to aggravate the condition.