17757 Posterior Urethral Stenosis

Overview

The urethra is the tube that carries urine from your bladder out of your body. The posterior urethra is the section nearest your bladder, passing through the prostate in men. A stenosis means a narrowing. So, posterior urethral stenosis is when part of this tube becomes narrowed or blocked, making it harder for urine to flow.

Posterior urethral stenosis is not the most common type of urethral narrowing. It happens less often than strictures in the front part of the urethra. However, it is a recognized condition, especially after pelvic trauma or certain medical procedures.

It affects mainly male teenagers and adults who have had a pelvic fracture or prostate surgery. It can also be present at birth or develop after radiation therapy for prostate cancer.

Symptoms

Common symptoms

• Weak or slow urine stream
• Straining to start urinating
• Feeling your bladder is not empty
• Urgency and frequency (needing to go often)
• Dribbling after urinating
• Sometimes blood in the urine

Symptoms in children

• Difficulty passing urine
• Weak stream or dribbling
• Irritability or crying when urinating
• Recurrent urinary tract infections

Symptoms in older adults

• Same symptoms as others, but often mistaken for age-related prostate problems
• Incomplete emptying may be worse
• More frequent nighttime urination

Causes

Main causes

• Pelvic trauma or injury, such as from a car accident or fall
• Prostate surgery, including removal of the prostate (prostatectomy)
• Radiation therapy for prostate cancer
• Scar tissue from previous urethral procedures or infections
• Rarely, being born with a narrow posterior urethra

Risk factors

• History of pelvic fractures
• Previous urological operations or catheterization
• Prostate cancer treatment
• Chronic urinary tract infections

When to see a doctor

See a doctor urgently if:

• If you cannot urinate at all, seek emergency care immediately.

Book a routine appointment if:

• If you notice a changing or weak urine stream, frequent bladder infections, or persistent discomfort, see your doctor for an evaluation.

Diagnosis

Your doctor will start by asking about your symptoms, medical history, and any past injuries or surgeries. They will examine your abdomen and pelvic area, and may order tests to see how well you urinate and to measure any narrowing.

Tests that may be done

• Urine test to check for infection or blood
• Uroflowmetry (a test that measures the strength and speed of your urine flow)
• Ultrasound or other imaging to see if your bladder empties fully
• Cystoscopy (a thin tube with a camera passed into the urethra) to look at the narrowing closely
• Sometimes MRI or specialized x-rays

What to expect at your appointment

Most tests are painless or cause only mild discomfort. The doctor will explain each step. You may be asked to pee into a special device, or a bladder scan may be done right after you pee. Cystoscopy is done with local anesthetic gel, and many people tolerate it very well. You can go home the same day.

Treatment

Treatment depends on how tight and long the narrowing is, and what caused it. The main goal is to relieve symptoms, protect your kidneys, and help you empty your bladder comfortably.

Self-care at home

• Drink enough water every day, unless your doctor tells you to limit fluids for a health reason.
• Empty your bladder regularly and do not hold urine for too long.
• Keep the area clean and stay well hydrated to reduce infection risk.

Medical treatments

Medical treatment may include temporary use of a catheter (a thin tube to drain urine), gentle stretching of the narrowing (dilation), or a small procedure to cut the scar tissue (called a urethrotomy). If an infection is present, your doctor may prescribe antibiotics. Sometimes a period of regular self-catheterization is taught to keep the channel open. No specific medication is approved just for this condition, so always follow your doctor's advice.

When is surgery considered?

In more severe or recurring cases, surgery may be recommended. The type of operation depends on the length and location of the narrowing. Your urologist will discuss the best option, expected recovery time, and any possible risks.

Living with this condition

Many people with posterior urethral stenosis lead active, fulfilling lives. You may need to urinate more often or take extra time to empty your bladder. Careful follow-up with your doctor helps keep symptoms under control.

Lifestyle tips

• Avoid activities that put direct pressure on your pelvic area if advised by your doctor.
• Maintain a healthy weight to reduce pressure on your pelvic floor.
• Quit smoking to improve healing and lower the risk of urinary infections.

Diet and exercise

A balanced diet with plenty of fruits, vegetables, and fiber helps avoid constipation, which can make urinary symptoms worse. Gentle exercise like walking or swimming is fine, but ask your doctor before starting heavy lifting or activities that involve repeated pressure on the pelvic area.

Mental health and emotional wellbeing

Living with urinary problems can be stressful and sometimes embarrassing. It is normal to feel anxious or frustrated. Talking to your doctor, a family member, or a counselor can help. There is no shame in seeking support.

Prevention

Not all cases can be prevented, but you can reduce your risk by taking sensible precautions, such as wearing a seatbelt to lower the chance of pelvic injury during a crash, and choosing experienced surgeons for any prostate or urethral procedures.

Screening programmes

There is no routine screening for posterior urethral stenosis. However, if you have risk factors such as previous pelvic surgery or injury, your doctor may monitor you for early signs.

Complications

If left untreated

• Continuing blockage that can lead to complete inability to urinate
• Bladder or kidney infections
• Long-term damage to the kidneys from back pressure
• Formation of bladder stones

Long-term outlook

With the right treatment, most people feel much better and avoid permanent kidney damage. Even if the narrowing comes back, there are many options. Your healthcare team will work with you to manage the condition and keep you comfortable.

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