Urethral Stricture Disease: Causes, Symptoms, Diagnosis & Treatment

The urethra is the tube that carries urine from the bladder to the outside of the body. When this tube becomes abnormally narrowed due to scar tissue formation, the condition is called urethral stricture disease.

A urethral stricture acts as a blockage within the urinary passage, making it difficult for urine to flow normally. The scar tissue causes the urethra to become narrow and rigid, which can significantly affect quality of life if left untreated.

In males, the urethra consists of several parts:

1. Prostatic Urethra

This section begins at the bladder neck and passes through the prostate gland.

2. Membranous Urethra

The next segment is surrounded by the urinary sphincter, which helps control urination.

3. Bulbar Urethra

Located in the perineal region (between the scrotum and anus), extending up to the penoscrotal junction.

4. Penile Urethra

This portion runs along the underside of the penis.

5. Meatus

The external opening of the urethra located at the tip of the penis.

A urethral stricture may develop anywhere along the urethra, from the urinary opening to the bulbomembranous junction.

Since a stricture is essentially scar tissue, it usually develops following injury, inflammation, or infection of the urethra.

Common Causes Include:

✅ Road Traffic Accidents

• Pelvic fractures can damage the urethra and lead to scarring.

✅ Straddle Injuries

• Commonly occur after falling onto a bicycle bar, motorcycle frame, or similar object, causing injury to the perineum.

✅ Infections

• Certain urinary tract and urethral infections can result in scar formation.

✅ Medical Instrumentation

• Catheterization
• Endoscopic procedures
• Stone removal surgeries
• Prostate surgeries

✅ Inflammatory Conditions

• Balanitis Xerotica Obliterans (BXO) and other genital skin disorders.

✅ Congenital Causes

• Rarely, strictures may be present from birth or occur after reconstructive surgery for congenital urinary abnormalities.

✅ Unknown Causes

• In some patients, no definite cause can be identified.

Urethral strictures are far more common in men because the male urethra is significantly longer and more vulnerable to injury and disease than the female urethra.

Individuals with a history of:

• Pelvic trauma
• Urinary infections
• Repeated catheterization
• Previous urological surgeries

are at increased risk.

Symptoms may develop gradually and worsen over time.

Patients commonly experience:

• Weak or poor urinary stream
• Straining during urination
• Frequent urination
• Feeling of incomplete bladder emptying
• Burning sensation while passing urine
• Blood in urine (Hematuria)
• Recurrent urinary tract infections
• Difficulty starting urination
• Urinary retention (inability to pass urine)

Can a Stricture Be Silent?

Yes. Some patients may have no symptoms and the condition may be discovered incidentally during routine investigations.

A urologist will begin with a detailed history and physical examination.

Initial Investigations

• Blood tests
• Urine examination
• Ultrasound of the urinary tract

Uroflowmetry

Uroflowmetry is a simple, non-invasive test in which the patient urinates into a specialized machine that measures:

• Speed of urine flow
• Flow pattern
• Volume of urine passed

A reduced flow rate often suggests an obstruction such as a urethral stricture.

1. Retrograde Urethrogram (RGU)

This is the most commonly used imaging test for diagnosing urethral strictures.

In this procedure:

• A contrast dye is gently introduced into the urethra through the tip of the penis.
• X-ray images are then taken.
• The narrowing and length of the stricture can be clearly identified.

2. Micturating Cystourethrogram (MCU)

This study evaluates:

• The bladder
• The urethra during urination
• The extent and severity of the blockage

Together, RGU and MCU provide detailed information essential for treatment planning.

Untreated urethral strictures may lead to:

• Recurrent urinary infections
• Bladder damage
• Formation of bladder stones
• Kidney damage
• Complete urinary retention

Early diagnosis and treatment can prevent these complications and significantly improve urinary function.

If you are experiencing difficulty passing urine, poor urinary flow, or recurrent urinary infections, consult a qualified urologist for evaluation.

Early diagnosis and appropriate treatment can restore normal urinary flow and improve overall quality of life.