Incontinence in Dogs: Causes, Symptoms, and What to Do

Name: Incontinence in Dogs: Causes, Symptoms, and What to Do
Creator: Dr. Zubair Khalid

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

Incontinence in dogs causes urine to leak without the dog's control, and it is not the same as a house-training problem or a dog choosing to urinate indoors. The most common causes include a weak urethral sphincter, urinary tract infections, and spinal or nerve disease, and the right treatment depends on which one your dog has. This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Urinary incontinence means unconscious leaking of urine, not deliberate urination in the house [1].
A weak urethral sphincter (often called hormone-responsive incontinence) is one of the most common causes in spayed females, but it is not the only one.
Any dog that leaks needs a urinalysis and urine culture, because infection can cause or worsen leaking.
Never give human incontinence or hormone medications to a dog. Your veterinarian calculates the dose from your dog's weight and health.
If your dog cannot urinate at all, strains without producing urine, or drags the back legs, that is an emergency.

What Incontinence in Dogs Actually Means

Urinary incontinence is the failure of voluntary control of urination, with constant or intermittent unconscious passage of urine [1]. In plain words, your dog is not deciding to pee in the wrong place. Urine escapes on its own.

You may find a wet patch where your dog was sleeping. You may see dribbling while your dog walks. The coat around the vulva or prepuce can stay wet, and the skin there can become red, sore, and infected from urine scalding [1].

This is different from a dog that urinates in the house on purpose. A dog with incontinence often seems unaware of the leaking. A dog with a behavior or training issue usually urinates in specific places and shows normal control at other times.

Veterinarians divide these problems into two broad groups. Some dogs cannot store urine properly, which causes leaking. Others cannot empty the bladder properly, which causes dribbling, straining, or an abnormal urine stream [1]. The distinction matters because the treatments are different.

Incontinence in Dogs Symptoms: What You Will Notice

The signs can be subtle at first. Common ones include:

Wet bedding or a urine spot where your dog was lying [1]
Dribbling urine while walking or after standing up [1]
A constantly damp or stained coat around the vulva or prepuce [1]
Red, irritated, or smelly skin around the genital area from urine scalding [1]
Licking at the genital area more than usual
A weak or interrupted urine stream, or straining to urinate [1]

Some dogs leak only at night. Some leak constantly. Some leak a little after they finish urinating normally. The pattern can point your veterinarian toward a cause, so write down when and where you see the leaking.

If your dog is also drinking and urinating more than usual, or if the urine looks cloudy or bloody, that raises the odds of an infection or another medical problem. Our guide to Dog UTI Symptoms: How to Recognize and What to Do covers those signs in more detail.

What Causes Dog Urinary Incontinence?

Many different problems can cause leaking. Your veterinarian's job is to sort out which one your dog has, because the treatments do not overlap much.

Weak Urethral Sphincter (Hormone-Responsive Incontinence)

The urethral sphincter is the muscle that holds urine in the bladder until your dog relaxes it to urinate. When that muscle is weak, urine leaks out, especially when your dog is relaxed or asleep. This is called urethral sphincter mechanism incontinence, or USMI [2].

USMI is common in middle-aged and older spayed female dogs. It is linked to hormone changes after spaying, which is why it is sometimes called hormone-responsive incontinence. It can also occur in dogs that have not been spayed, and in males.

A 2025 case report described a 16-month-old spayed female miniature poodle with USMI that did not respond to standard medications [2]. That dog was found to have lower back pain, and treatment of the back pain with manual therapy, acupuncture, and photomodulation resolved the incontinence within 2 days, after which medications were gradually reduced [2]. This is one case, not a general rule, but it shows why a full evaluation matters instead of assuming every leak is hormonal.

Urinary Tract Infection

A urinary tract infection irritates the bladder lining and can cause urgency, frequency, and leaking. Infection can also be a consequence of incontinence, because urine sitting on the skin and in the genital area creates a friendly environment for bacteria. This is one reason a urine culture is part of the workup.

Spinal and Nerve Disease

Nerves carry the signals that tell the bladder when to fill and when to empty. Anything that interferes with those signals can cause incontinence. This includes intervertebral disc disease, degenerative spinal conditions, and nerve damage after surgery or trauma. The back pain case above is an example of how a problem outside the urinary tract can show up as leaking [2].

Anatomical Problems

Some dogs are born with urinary tract abnormalities. Ectopic ureters are uncommon congenital abnormalities in which the ureter empties into the wrong place, and they cause urinary incontinence [3]. Female dogs are affected more often than males [3]. These cases are usually diagnosed in young dogs and require surgical correction [3].

Urethral diverticulum is another structural problem. It is an outpouching of the urethra, and it has been reported in male dogs with urinary incontinence [4]. In one study of 8 male dogs with urethral diverticulum, 7 of the 8 diverticula were within the prostatic urethra [4].

Prostate and Pelvic Problems in Male Dogs

In male dogs, prostate disease and pelvic surgery can affect urine control. One report described a 5-month-old neutered miniature schnauzer that developed passive urinary incontinence after an inadvertent prostatectomy and urethral surgery, and the incontinence did not respond to medical management [5]. Perineal hernia surgery is another pelvic procedure that can be followed by problems with control. A 2025 study found that dogs neutered before perineal hernia repair were 4.4 times as likely to have the hernia recur, and dogs that developed fecal incontinence after surgery were 3.4 times as likely to have a recurrence [6].

Incontinence in Dogs Old Age

Older dogs are more likely to leak for several reasons. Muscle tone declines with age, arthritis can make it painful to get up and posture to urinate, and cognitive changes can affect house habits. Older dogs also have higher rates of spinal disease and other chronic conditions. If your senior dog has started leaking, our guide to How to Care for a Senior Dog with Incontinence: Tips and Products walks through practical management at home.

Incontinence in Dogs Male

Male dogs leak for many of the same reasons females do, but the list of likely causes shifts. Prostate disease, urethral diverticulum, and complications after pelvic or urethral surgery are more prominent concerns in males [5][4]. A male dog that dribbles after urinating, strains, or has a changed urine stream needs a veterinary exam.

Cause	Who is most affected	Typical clue
Weak urethral sphincter (USMI)	Middle-aged to older spayed females	Leaking when relaxed or asleep
Urinary tract infection	Any dog	Cloudy urine, frequent attempts, accidents
Spinal or nerve disease	Any age, more common in seniors	Weak back legs, pain, trouble posturing
Ectopic ureter	Young dogs, females more often [3]	Leaking since puppyhood
Urethral diverticulum	Male dogs [4]	Dribbling, recurrent infections
Post-surgical changes	Dogs after pelvic or urethral surgery [5][6]	Leaking starting after the procedure

How Veterinarians Diagnose the Cause

Diagnosis depends on a careful history, a full physical exam (including watching your dog urinate), and testing such as urinalysis and imaging or advanced procedures to look at the urinary tract [1].

Your veterinarian will ask when the leaking started, whether it happens during sleep or activity, whether your dog strains to urinate, and whether there have been previous surgeries. Bring a fresh urine sample if you can, or expect the clinic to collect one.

A urinalysis checks for infection, crystals, blood, and concentration problems. A urine culture and sensitivity identifies bacteria and which antibiotics will kill them. Blood work assesses overall health and can point to hormone or metabolic issues.

Imaging helps find structural causes. Ultrasound, contrast studies, cystoscopy, and CT have all been used to confirm diagnoses such as USMI, ectopic ureters, and urethral diverticulum [2][3][4]. In one study, a contrast cystourethrogram was diagnostic in all 8 dogs with urethral diverticulum [4].

If your dog has back pain, weakness, or trouble walking, your veterinarian may recommend spinal imaging. The poodle case described earlier went through blood work, urinalysis, culture, ultrasound, cystoscopy, and contrast CT before the back problem was identified [2].

Treatment Options for Incontinence in Dogs

Treatment targets the underlying cause. There is no single drug that fixes every leaky dog.

Medication for a Weak Sphincter

For USMI, veterinarians often prescribe medications that increase urethral muscle tone or replace hormone support. Two drugs that appear in the veterinary literature are phenylpropanolamine and estriol [2][5]. Doses are calculated by your veterinarian based on your dog's weight and health, and they are not the same as human doses. Never give your dog medication prescribed for a person.

Some dogs respond well to medication alone. Others need a combination approach. If medication does not control the leaking, your veterinarian will look for a second problem, such as infection, back pain, or a structural defect [2].

Treating Infection

If a urinary tract infection is present, antibiotics based on culture results are the main treatment. Your dog may need a recheck culture after treatment to confirm the infection has cleared, especially if leaking continues.

Surgery for Structural Causes

Ectopic ureters require surgical correction [3]. Minimally invasive options include laparoscopic ureteroneocystostomy and cystoscopically guided laser ablation, and in one study of 16 dogs, all procedures were completed without converting to open surgery [3]. Minor complications included slight blood in the urine and a few cases of cystitis that responded to treatment [3].

For dogs with a weak sphincter that does not respond to medication, an artificial urethral sphincter is an option. In one report, a 5-month-old miniature schnauzer with incontinence after prostate surgery became continent after placement of an artificial urethral sphincter, with 5 top-ups to a total volume of 0.9 mL, and remained continent for 5.5 weeks of follow-up [5]. In another study, 8 male dogs with urethral diverticulum were treated with an artificial urethral sphincter [4].

Treating Pain and Other Body Systems

When back pain or another painful condition is contributing, treating that problem can improve continence. In the reported poodle case, manual therapy, acupuncture, and photomodulation were followed by continence within 2 days [2]. This does not mean every incontinent dog needs acupuncture. It means a complete exam can uncover causes that medication alone will not fix.

Managing the Environment

While treatment is being sorted out, keep your dog dry and comfortable. Frequent bedding changes, waterproof covers, and gentle cleaning of the skin help prevent urine scalding [1]. Do not restrict water without veterinary guidance, because concentrated urine can worsen bladder problems.

Recovery, Outlook, and Long-Term Management

The outlook depends on the cause. Infection-related leaking often resolves with the right antibiotic. Hormone-responsive incontinence is usually manageable with medication, though some dogs need dose adjustments over time. Structural problems that are surgically corrected often improve dramatically, though some dogs still leak to some degree afterward [3].

Some dogs need lifelong management. That can mean daily medication, regular urine checks, and a good home setup. It does not mean your dog cannot have a good quality of life. Many incontinent dogs do very well with consistent care.

Keep a simple log of leaking episodes, medication times, and any changes in drinking or urination. Bring it to every recheck. Patterns in that log often guide the next step better than a single exam does.

Prevention

Not every cause of incontinence can be prevented, but you can lower some risks.

Treat urinary tract infections promptly and finish the full course of antibiotics.
Keep your dog at a healthy weight to reduce strain on the back and joints.
Ask your veterinarian about incontinence risk before spaying, especially in breeds prone to USMI.
Watch for early signs in senior dogs and bring them up at routine visits instead of waiting.
Manage arthritis and back pain so your dog can posture comfortably to urinate.
Keep follow-up appointments after pelvic or urinary surgery, since leaking can start weeks later [5][6].

Limitations and When to Contact a Veterinarian

This article cannot tell you what is causing your dog's leaking. Only a veterinarian who examines your dog and runs the right tests can do that. Individual cases need individual veterinary care.

Contact your veterinarian the same day if:

Your dog has been leaking for more than a day or two
The urine is bloody, cloudy, or foul-smelling
Your dog is drinking or urinating much more than usual
The skin around the genitals is red, raw, or infected
Your dog is straining to urinate or producing only small amounts

Go to an emergency clinic now if:

Your dog cannot pass urine at all despite trying
Your dog cries out or shows severe pain when urinating
Your dog's back legs are suddenly weak, wobbly, or dragging
Your dog collapses or seems very ill

A dog that cannot urinate is a true emergency. A blocked bladder can become life-threatening within hours.

Frequently Asked Questions

Is leaking urine the same as a house-training problem?

No. Incontinence is the unconscious passage of urine, meaning your dog has lost voluntary control [1]. A house-training problem involves a dog that can control urination but chooses the wrong spot. The distinction changes both the diagnosis and the treatment plan.

Can a urinary tract infection cause leaking in a dog that never leaked before?

Yes. Infection irritates the bladder and can cause urgency and accidents in a dog with previously normal control. A urinalysis and urine culture are the standard first steps for any new leak, and treatment usually resolves the problem if infection is the only cause.

Will my dog need medication for life?

It depends on the cause. Dogs with hormone-responsive incontinence often need long-term medication, while dogs whose leaking was caused by an infection may stop medication once the infection clears. Your veterinarian will reassess at rechecks and adjust the plan based on how your dog responds.

Does spaying cause incontinence in female dogs?

Spaying is a known risk factor for urethral sphincter mechanism incontinence, but most spayed females never develop it. The risk is one factor to weigh when planning surgery, and it does not mean you should skip spaying. Talk with your veterinarian about timing and your dog's individual risk.

Can I use human incontinence pads or diapers on my dog?

You can use dog-specific belly bands or diapers as a short-term management tool, but they are not a treatment. They also trap moisture against the skin, which can worsen urine scalding [1]. Change them often, keep the skin clean and dry, and still pursue a diagnosis with your veterinarian.

If your dog leaks mainly during sleep, our article on Why Is My Dog peeing in sleep? Urinary Incontinence and Hormone Deficiency explains that specific pattern. If your dog is urinating often but not necessarily leaking, see Dog Urinating Frequently: Causes and When to Call the Vet. And if you are trying to sort out whether infection or a weak sphincter is behind the accidents, Dog Incontinence: How to Tell If It's a Bladder Infection or Weak Sphincter breaks down the differences.

References

Disorders of Micturition in Dogs and Cats - Urinary System. Merck Veterinary Manual.
Treatment of lower back pain to resolve symptoms of canine urethral sphincter mechanism incontinence. Open veterinary journal, 2025.
Minimally Invasive Surgical Techniques for the Treatment of Dogs with Urinary Incontinence Due to Ureteral Ectopia. Life (Basel, Switzerland), 2025.
Placement of an artificial urethral sphincter in 8 male dogs with urethral diverticulum. Journal of veterinary internal medicine, 2024.
Placement of an artificial urethral sphincter for treatment of passive urinary incontinence after inadvertent prostatectomy and balloon dilation treatment for stricture formation in a 5-month-old dog. Journal of the American Veterinary Medical Association, 2024.
Dogs neutered prior to perineal herniorrhaphy or that develop postoperative fecal incontinence are at an increased risk for perineal hernia recurrence. Journal of the American Veterinary Medical Association, 2025.