Radiation therapy for prostate cancer may cause urethral injury, proctitis symptoms, and other symptoms of radiation injury. Since the urethra, bladder neck, rectum and other surrounding organs and tissues will be irradiated when prostate cancer is undergoing radiation therapy, it may cause damage to the corresponding parts, which may result in urethral injury phenomena such as urinary urgency, urinary frequency, hematuria, and urinary pain. There may also be symptoms of proctitis such as increased frequency of bowel movements, blood in the stool, discomfort in the lower abdomen, a strong desire to relieve bowel movements, and a feeling of incomplete bowel movement after bowel movements, even resulting in perforation of the rectum. Localized skin erosion and ulcer conditions may also occur. In addition to site-specific side effects, radiation therapy for prostate cancer may also cause side effects such as fever, nausea, vomiting, and anemia. Radiation therapy for prostate cancer should be considered after full evaluation by a physician.