The term protest urination can be misleading: urinating outside the litter tray does not mean that a cat is taking revenge on their owner. Pain, environmental stress or difficulty reaching the tray may be responsible. These situations also need investigation, even if no involuntary urine leakage is found.
When to see a vet urgently
Contact a vet immediately if you notice any of the following signs:
- repeated attempts to urinate with no urine or only a few drops produced;
- clearly painful urination and increasing restlessness;
- difficulty urinating accompanied by weakness or a rapid deterioration in general condition;
- changes in urination or hindlimb function after a back or pelvic injury.
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Overview
Urinary incontinence is less common in cats than in dogs, but is diagnosed particularly in older cats and those with neurological disorders. It may appear as constant dribbling or intermittent episodes, for example during sleep or physical exertion.
The bladder must both store urine and empty in a controlled way. During storage, the urethra needs to remain closed and the bladder must accommodate filling. During urination, the bladder muscle contracts and the outflow route must open. Either phase may be affected, so not every case of incontinence involves a weak sphincter.
In overflow incontinence, the bladder does not empty sufficiently. It stretches, and urine begins to dribble because it is overfull. Wet bedding or a few drops in the litter tray therefore do not guarantee that urine is flowing normally. This distinction is particularly important when your cat is straining or repeatedly visiting the tray.
Causes
The main causes of urinary incontinence in cats are:
- neurological disorders, including spinal cord damage, tumours and injuries;
- congenital abnormalities of the urethra;
- chronic inflammation, including cystitis and urethritis;
- urinary stones and urethral obstructions;
- complications after surgery, such as damage to the bladder sphincter;
- reduced urethral muscle tone with ageing;
- hormonal disorders.
A congenital abnormality may also affect a ureter, the tube carrying urine from a kidney to the bladder. An ectopic ureter opens in the wrong place, which can disrupt normal urine storage. The ureter and the urethra, which carries urine out of the bladder, are different structures. The abnormality may affect one or both ureters.
A structural problem of this kind may become apparent in a kitten or young adult. Some cats urinate normally while also dribbling urine at other times. A normal litter tray visit therefore does not rule out a congenital abnormality. The structure of the whole urinary tract is investigated when planning treatment.
In urge incontinence, urine leaks with the urge to urinate, for example when an irritated bladder contracts. This differs from urine leaking unnoticed while a cat sleeps. Both may cause wet fur, but the way the symptom arises differs. Explain whether your cat seems aware of the leakage and whether it is accompanied by a more frequent need to use the tray.
Risk factors
Urinary incontinence occurs more often in cats that:
- are old;
- have suffered back or pelvic injuries;
- have chronic urinary tract disease;
- are neutered, in rare cases because of reduced urethral muscle tone;
- have neurological conditions.
Involuntary urinary incontinence is an uncommon symptom in cats, and research is limited compared with dogs. For example, the sphincter weakness commonly seen after spaying in dogs cannot automatically be considered the most likely cause in a cat. Age or neutering alone does not confirm a diagnosis.
Main symptoms
The following signs may raise suspicion of urinary incontinence:
- constant or intermittent dribbling of urine;
- damp fur and skin around the genitals and hindlegs;
- a smell of urine on the cat;
- puddles despite regular litter tray use;
- irritated skin (dermatitis) around the tail and hindlegs.
At the appointment, describe whether urine leaks while your cat sleeps or whether they deliberately adopt a urinating posture in an inappropriate place. A marking cat often sprays a vertical surface while standing with the tail raised. With involuntary leakage, urine may be left where a cat has been resting. These observations help the investigation, but you do not need to establish the distinction with certainty before booking an appointment.
Painful urination may cause a cat to associate the litter tray with discomfort. Conversely, joint or mobility problems can make it difficult to get into a high-sided tray. A cat drinking and urinating a lot may also need the tray more often than before. These situations can occur alongside an underlying urinary tract disease.
Complications and consequences
Without treatment, urinary incontinence can lead to:
- chronic urinary tract infections;
- skin inflammation (moist dermatitis);
- bladder stone formation because urine is retained;
- reduced quality of life and discomfort at home.
Diagnosis at the vet
Investigations to establish the cause of urinary incontinence include:
- urinalysis;
- ultrasound of the bladder and kidneys;
- X-rays and contrast imaging of the urinary tract;
- a neurological examination;
- blood tests to rule out other diseases.
The history establishes when the symptom began, whether the urine stream has changed and whether a normal amount of urine is produced. Also mention drinking, any blood in the urine, previous obstructions, injuries and operations. If leakage has been present since kittenhood, make this clear. The duration of symptoms helps distinguish congenital problems from those developing later.
The vet feels the bladder and, where possible, assesses its filling before urination and emptying afterwards. A large amount of residual urine may suggest an emptying disorder. The neurological examination also considers hindlimb function and nerve responses in the pelvic region. Wet fur alone therefore does not reveal what kind of functional problem is affecting the bladder.
A urine sample is examined for cells and other abnormalities, for example. Bacterial culture may be needed to investigate infection. Signs of inflammation do not always mean a bacterial infection, because cats also develop other forms of bladder inflammation. An antibiotic is therefore not the automatic treatment for every urinary symptom.
If an abnormal course of a ureter is suspected, the usual investigation may be supplemented by computed tomography or endoscopy. Cystoscopy means examining the inner surfaces of the bladder and urethra with a scope. This can establish where the ureter opens. Any other structural abnormalities affecting treatment choices are investigated at the same time.
Treatment and organising home care
Treatment depends on whether urine leaks because of poor storage or because the bladder fails to empty. The vet may use medication that affects bladder or urethral muscle function, but its effect must suit the disorder identified. Symptoms arising through different mechanisms are not treated in the same way. Do not experiment with a product prescribed for a person or another animal.
A complete urethral obstruction needs urgent treatment. Urine flow may have to be restored using a catheter, a thin tube, or another procedure. If prolonged stretching has damaged the bladder muscle, the vet may provide support to empty the bladder. Dribbling urine does not remove the need for treatment in this situation.
Treating an ectopic ureter may require surgery or, in selected cases, a procedure performed during endoscopy. The aim is to direct urine to the correct place. Leakage may persist even after the procedure, in which case the need for further treatment is assessed. Correcting an anatomical abnormality does not produce the same outcome in every animal.
Tell the treating vet if leakage continues, skin becomes irritated or the urine stream weakens. Problems to watch for after surgery include urinary tract infection and narrowing at the procedure site. Follow-up assesses both urine flow and the ability to hold urine. Previously diagnosed incontinence should not be used to explain new, painful straining.
Everyday arrangements
Place the litter tray somewhere your cat can reach easily without another animal interfering. A low entrance may help a cat with mobility problems use it. If stairs are difficult, the tray should be accessible without using them. These changes make toileting easier, although they do not correct every cause of incontinence.
Keep the tray clean and provide a quiet place for toileting. In a home with several cats, trays are needed in different places so that one animal's presence does not prevent another from using them. Access to food, water and resting places also needs consideration. Reducing environmental stress is particularly helpful if bladder inflammation symptoms are also present.
Clean urine-soiled surfaces and sleeping areas in your home so that the remaining smell does not draw your cat back to the same place. The aim is to remove the smell, rather than simply cover it with another scent. If the skin remains wet or becomes red, ask your vet for skin care advice. Constant contact with urine can damage the skin.
Prevention
Urinary incontinence cannot be prevented completely, but the risk can be reduced through:
- timely treatment of bladder and urethral diseases;
- weight and activity management;
- protection against back and pelvic injuries;
- regular check-ups for older cats.
What it means for owners
Urinary incontinence in cats is a symptom of urinary tract or nervous system disease rather than a behavioural problem. Owners should remember that their cat is not to blame and punishment is unacceptable. Seeking veterinary care helps identify the cause and choose treatment that makes your cat more comfortable.
Frequently asked questions
Can urine leak even when the urethra is blocked?
A partial obstruction or poor bladder emptying can cause overflow incontinence. Drops of urine therefore do not prove that the bladder is emptying normally. If your cat strains and produces little urine, they need urgent veterinary assessment.
Is incontinence in an old cat a normal part of ageing?
A new change in urination needs investigation even in an old cat. Urinary tract disease, a neurological problem, increased urine production or difficulty reaching the tray may be responsible. Treatment options depend on the cause found.
Can congenital urinary incontinence be treated?
Surgical or endoscopic treatments are available for some structural causes, such as an ectopic ureter. The abnormality is located first. Monitoring and further treatment may still be needed afterwards if bladder control does not return fully.
This article is for general information only and is not a guide to treatment. If you notice the first signs of illness, contact your vet.
Paw4care editorial team
Sources
- Noninfectious Diseases of the Urinary System of Cats, Merck Veterinary Manual, accessed 2026-11-02.
- Disorders of Micturition in Dogs and Cats, Merck Veterinary Manual, accessed 2026-11-02.
- Ectopic Ureter, American College of Veterinary Surgeons, accessed 2026-11-02.
- Feline Lower Urinary Tract Disease, Cornell Feline Health Centre, accessed 2026-11-02.
- Feline Behaviour Problems: House Soiling, Cornell Feline Health Centre, accessed 2026-11-02.