Weak urine stream

Category: Urinary & Kidneys · All urinary symptoms

What it can feel like

A weak urine stream means urine flows slowly, in a thin or spraying stream, taking longer to empty the bladder, sometimes with dribbling at the end. Like hesitancy, in men it most often reflects prostate enlargement narrowing the outflow, and it is assessed as part of the whole urinary pattern.

Possible causes

A symptom can have many causes, and most are not serious. The lists below group conditions this symptom can be associated with — common causes first. They are possibilities to discuss with a clinician, not a diagnosis.

Common causes

A weak stream can be associated with prostate enlargement, constipation, dehydration (less urine to pass), and simply ageing changes in the bladder muscle.

Other possible causes

A weak stream can also be associated with a urethral stricture (scar narrowing), prostate conditions including cancer, a bladder stone sitting at the outlet, and nerve problems weakening the bladder squeeze.

Red flags — when to seek help promptly

A stream that stops altogether, with bladder pain — urgent
Weak stream with blood in the urine or repeated infections
Weak stream with unexplained weight loss or bone pain (in men)
Weak stream with new leg weakness or numbness

What a clinician may do

A clinician will examine the abdomen and prostate, test urine, and arrange a flow-rate test with a bladder scan for residual urine. Blood tests, including kidney function and PSA where appropriate, and sometimes a camera look at the water pipe (cystoscopy) follow.

Related guides on MedicalVideos.com

Frequently asked questions

What is a flow-rate test?

You pass urine into a device that plots flow against time. A healthy curve rises quickly to a strong peak; obstruction flattens and prolongs it. Combined with the leftover-volume scan it shows whether the problem is the pipe, the pump, or both.

Do all weak streams need surgery?

No — many are managed with medicines that relax the prostate and bladder neck, or shrink the prostate over months. Surgery (such as TURP) is for symptoms that remain troublesome, poor emptying, or complications such as retention and infections.

Related symptoms — Urinary & Kidneys

Being unable to pass urine Blood in the urine Cloudy or strong-smelling urine Difficulty starting to urinate Flank pain Foamy urine

Browse the W section of the A–Z list or return to the Symptoms A–Z hub.

Please note: This page is educational information about a symptom. A symptom alone cannot diagnose any condition, and the causes listed here are possibilities, not a diagnosis. If you are worried about a symptom — especially one that is new, severe, getting worse or not going away — please see your own clinician, who can examine you and arrange tests. In an emergency, call your local emergency number.