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What to do if…
you have a urinary catheter and it suddenly stops draining with pressure building

Short answer

If you have a catheter and it stops draining and you feel your bladder filling/pressure building, treat this as urgent: do a 30–60 second check for a simple blockage, then get urgent NHS help immediately (district nurse / catheter service / NHS 111). If pain is severe or you can’t get help fast, go to A&E or call 999.

Do not do these things

  • Do not pull, cut, clamp, or remove the catheter yourself.
  • Do not force urine out by pressing hard on your lower tummy.
  • Do not try to flush/irrigate the catheter unless you have been specifically trained and told to do so for your catheter.
  • Do not rapidly drink large volumes to “push it through” when you already feel very full/pressured. If you’re allowed fluids, stick to normal sips while you arrange urgent help.
  • Do not “wait and see” for hours if no urine is draining and pressure is building.

What to do now

  1. Get into a safer, calmer setup (right now).
    Sit or lie comfortably. Keep the drainage bag where you can see it. This reduces the risk of tugging or twisting the catheter while panicking.

  2. Do a fast 30–60 second “simple blockage” check (don’t delay beyond this):

    • Make sure the drainage bag is below bladder level (below your lower tummy), not on a chair/bed above you.
    • Check the tubing is not kinked, twisted, looped, trapped under your thigh/body, or pulled tight.
    • If you use a catheter valve, make sure it’s open. If you normally keep it connected to a bag, ensure the connection is secure—but don’t disconnect things unnecessarily.
    • If the bag is very full, empty it (a heavy bag can tug and interfere with flow).

  3. Change position once, gently.
    Stand up (if safe), or roll slightly to the other side, or straighten your leg. Sometimes this releases a kink or improves drainage.

  4. If it still won’t drain and pressure is building: get urgent NHS help now.
    Use the quickest route available to you:

    • Call your district nurse / continence or urology catheter service if you have a contact number.
    • If you don’t, call NHS 111 and say: “Urinary catheter stopped draining; bladder pressure/pain building; I think it’s blocked.”

  5. Escalate immediately if symptoms are severe or you can’t get help fast.

    • Go to A&E if you are very uncomfortable or rapidly worsening.
    • Call 999 if pain is severe/unmanageable, you feel faint/collapse, you’re confused, or you cannot get to A&E safely.

  6. While waiting for help:

    • Keep the bag below bladder level and tubing straight; avoid tugging.
    • If you can, note roughly when it last drained and whether you can see debris/clots in the tube or bag.
    • If you develop fever/chills, vomiting, confusion, worsening pain, or you feel faint: escalate (111/999 as above).

What can wait

  • You do not need to decide why it blocked or whether you “did something wrong” right now.
  • You do not need to clean/change equipment beyond basic hand hygiene and keeping tubing unkinked.
  • You do not need to sort supplies, reorder bags, or plan long-term prevention until it’s draining again and you’ve been assessed.

Important reassurance

A sudden stop in drainage can happen even when you’ve done everything right (positioning, kinks, debris, spasms). Feeling panicky with a “full bladder” sensation is normal—your job is simply: quick check, then urgent help.

Scope note

This is first-steps-only guidance for the moment your catheter stops draining with discomfort/pressure building. After it’s resolved, a clinician may suggest changes (catheter size/type, maintenance plan, review for infection or debris).

Important note

This guide is general information, not a diagnosis or a substitute for urgent medical care. A catheter that stops draining with building pressure can represent urinary retention, which needs prompt assessment and may require catheter change or specialist help.

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