Scar tissue can narrow the urethra and slow the urine stream. Here is how it is diagnosed, the treatment options — from dilatation to urethroplasty — and why the right first choice matters.

Usually in men, and often developing slowly.
A fall astride a hard object (bicycle bar, wall), or a pelvic fracture in an accident.
Catheters, scopes or earlier surgery through the urethra can leave scarring.
Past infections and a skin condition called lichen sclerosus can cause scarring.
In some men no cause is found.
Each repeated cut or dilatation can lengthen the scar over time.
Can lead to infections, stones, bladder damage and kidney strain.
In-house flow test — strictures give a typical flat, low flow curve.
Checks how much urine is left in the bladder and the kidneys.
An X-ray with dye that shows exactly where the stricture is and how long it is.
A camera look at the narrowing when needed.
A thin scope with a tiny blade opens a short narrowing from inside — no cut on the body. Works best for short, first-time strictures.
Gentle stretching, sometimes followed by regular self-dilatation at home to keep the passage open.
Open reconstruction — the scar is removed and the urethra rejoined, or widened with a graft (often from inside the cheek). Gives the most lasting results for longer or recurrent strictures.
Each repeat urethrotomy or dilatation is less likely to work, and can make the scar longer. If a stricture keeps coming back, urethroplasty is usually the better long-term option — this is discussed with you based on the urethrogram.
It is a narrowing of the urethra (the tube that carries urine out of the body) caused by scar tissue. It slows the urine stream and can cause infections and difficulty passing urine.
Short strictures can often be opened from inside with a thin scope (urethrotomy). Longer or recurrent strictures usually need urethroplasty for a lasting result.
Dilatation and urethrotomy stretch or cut the scar, but scar tissue can re-form. With each repeat, success becomes less likely, which is when urethroplasty is considered.
An operation that repairs the urethra — either by removing the scarred segment and joining the healthy ends, or by widening it with a graft, often taken from inside the cheek.
With regular flow tests (uroflowmetry) and symptom checks, so any narrowing is caught early.
Yes. Go to the nearest hospital. With a known stricture, tell them, as a normal catheter may not pass and a urologist may be needed.
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Medically reviewed by Dr. Nameirakpam Shantajit, M.Ch Urology (MMC Reg. No. MNP 150) · Last reviewed: 10 October 2026