Urethral stricture may be caused by inflammation or scar tissue from surgery, disease, or injury. It may also be caused by external pressure from an enlarging tumor near the urethra, although this is rare.
Risk Factors Increased risk is associated with men who have a history of sexually transmitted disease (STD), repeated episodes of urethritis or benign prostatic hyperplasia (BPH). There is also an increased risk of urethral stricture after an injury or trauma to the pelvic region. Any instrument inserted into the urethra ( catheter or cystoscope) increases the chance of developing urethral strictures.