Information

Why is My Cat Peeing so Much?


As more and more cats live exclusively indoors (where they’re safest) more and more are also using the litter box. One of the best things about a litter box is that it allows you to be more aware of your cat’s urine habits. You may notice, for example, that you’re cleaning the box more often.

[Learn all about the diagnostic value of a litter box here.]

If there is more urine in the litter box, it can sometimes be a bit difficult to tell if a cat is peeing larger volumes or just more often; however, it’s important to differentiate increased frequency from increased volume, since they indicate completely different potential problems and point to different locations in the urinary system. There are conditions that cause increased frequency of small amounts of urine, conditions that result in large volumes of urine and conditions that cause increased attempts to urinate. You may need to keep a close eye on your cat to know for sure.

It will also be important to know what is normal for your cat so that changes will be noticeable. One study, reported by DVM 360, indicated that cats produced an average of 28 ml/kg of urine every 24 hours. That equals about one half cup of urine a day for the average 10 pound cat. In general, what goes in must come out. Although minute water losses include tear flow, saliva flow and fluids contained in stools, the majority of water leaves the body of animals as urine.

Is your cat peeing a lot or just often?
Increased urine frequency (pollakiuria): If your cat is urinating small volumes frequently, he is not peeing too much; in fact, he may not be peeing enough. This condition is called oliguria and refers to decreased urine formation by kidneys or decreased elimination of urine from the body. Voiding frequent, small volumes is most often a sign of bladder irritation associated with sterile, idiopathic inflammation, infection, bladder stones or obstruction. Alternatively, increased frequency of a normal volume or increased attempts to urinate are serious signs of urinary problems, indicating possible inflammation or a sense of urgency associated with an inability to empty the bladder because of some form of blockage. Oliguria associated with decreased urine formation by the kidneys may be in compensation for bodily fluid losses elsewhere or it may be pathologic, but is always significant. These conditions should be treated as an emergency and must be evaluated by a veterinarian as soon as possible.

Increased volume (polyuria): If your cat is urinating larger than normal volumes, it’s called polyuria. Most of the time excessive urinating is a result of the body’s inability to regulate urine formation. Excess blood glucose, for instance, leaves the body through urine and carries a lot of water with it. Kidney disease often results in an inability to retain fluids and so urine forms more rapidly than normal. Some hormonal diseases such as diabetes or hyperthyroidism result in poor urine concentrating ability, causing too much water to be excreted as urine. Whatever the cause, the result is increased water intake in an effort to balance this excess urine output.

How will my veterinarian decide why my cat is peeing excessively?
Your veterinarian will always start with a thorough physical examination, but blood and urine tests are needed to evaluate organ function.

What should I do if my cat seems to be peeing more than usual?
These conditions are always serious and can be life threatening. The sooner your cat is diagnosed, the greater the chances of success. See your veterinarian at once!

Also check out:

  • Kidney Disease in Cats 101
  • Chronic Kidney Disease: What Does Kidney Failure in Cats Really Mean?
  • 5 Things Vets Hate About Kidney Disease in Cats … And How That’s About to Change

If you have any questions or concerns, you should always visit or call your veterinarian -- they are your best resource to ensure the health and well-being of your pets.

Reviewed on:

Wednesday, April 29, 2015


Clean Up All Urine Accidents Properly to Discourage Peeing Outside the Box

Between your care as a cat parent and the help of your veterinarian, you’ll have your kitty on the mend and back in the litter box soon. And one more thing: make sure you clean up any urine outside of the litter box completely, so that your cat doesn’t return to that area to pee again. This is very important for re-training them to use the litter box and not picking up new (and unwanted) habits. Try ARM & HAMMER™ Pet Stain and Odor Eliminator Plus OxiClean™ to neutralize the urine smell and remove stains.


Feline lower urinary tract disease

What is feline lower urinary tract disease?

Feline lower urinary tract disease (FLUTD) describes a variety of conditions that affect the bladder and urethra of cats. Cats with FLUTD most often show signs of difficulty and pain when urinating, increased frequency of urination, and blood in the urine. Cats with FLUTD also tend to lick themselves excessively and may urinate outside the litter box, often on cool, smooth surfaces like a tile floor or a bathtub.

While FLUTD can occur at any age, it is usually seen in middle-aged, overweight cats that get little exercise, use an indoor litter box, have little or no outdoor access, or eat a dry diet. Factors such as emotional or environment stress, multi-cat households, and abrupt changes in daily routine may also increase the risk that a cat will develop FLUTD.

Major signs of feline lower urinary tract disease include:

  • Straining to urinate
  • Urinating small amounts
  • Frequent and/or prolonged attempts to urinate
  • Crying out while urinating
  • Excessive licking of the genital area
  • Urinating outside the litter box
  • Blood in the urine

Note that cats with a urethral obstruction (a blockage in the urethra, which is the tube that carries urine from the bladder and out of the body) will also show these signs but will pass little or no urine and become increasingly distressed. Urethral obstruction is seen more often in males than female cats due their longer, narrow urethra. A urethral obstruction is an emergency and requires immediate veterinary treatment. (See section on Urethral Obstruction.)

How is FLUTD diagnosed?

Because FLUTD has many causes, it can be difficult to diagnose. Based on your cat's symptoms, your veterinarian will do a physical examination and most likely will run a urinalysis assessing urine pH and concentration and presence of crystals, bleeding, inflammation and infection. If the cause is still not identified, tests such as urine culture, x-rays, blood work and additional urine tests may be recommended.

What are the causes of FLUTD?

Urolithiasis (urinary stones)

One possible cause of FLUTD is the formation of urinary stones, also called uroliths, in the bladder and/or urethra. These are collections of minerals that form in the urinary tract of cats. X-rays or ultrasound are usually needed to diagnose urinary stones. The most commonly seen uroliths are calcium oxalate and struvite (magnesium ammonium phosphate). While a special, stone-dissolving diet can be prescribed to dissolve struvite stones, calcium oxalate stones need to be removed surgically. If the diet fails, or if the stones form again, then surgery may also be necessary for struvite stones. In female cats, it may also be possible for a veterinarian to help a cat pass stones by flushing its bladder with sterile fluids or remove small stones directly from the bladder using a cystoscope when the cat is under anesthesia. A veterinarian may then recommend medication or dietary changes after surgery to help prevent recurrence.

Urinary infection

Infection of your cat’s urinary tract with bacteria, fungi, parasites or possibly even viruses can cause signs of FLUTD. Although bacterial infections are more common than fungal, parasitic or viral infections, they are still relatively uncommon in cats. If an infection is found, your veterinarian will probably look for another disease or problem that may have put your cat at risk of infection. For example, uroliths and diabetes can increase the risk of urinary tract infection.

In younger cats, bladder infections are a cause of FLUTD less than 5% of the time because the acid content and concentration of their urine prevents infection. Diseases such as kidney disease and diabetes are more common in cats older than 10 years of age, and alter the acidity and concentration of the urine – as a result, these cats are at higher risk of infection. Urinary tract infection is a relatively common cause of FLUTD in older cats, followed by uroliths.

The treatment for urinary infections often depends on the severity of the infection and the organism causing the infection, and may include fluid therapy, urinary acidifiers, and/or antibiotics.

Urethral obstruction

The most serious problem associated with urinary function is when a cat's urethra becomes partly or totally blocked. These cats strain to urinate and produce little or no urine. It can appear that the cat is constipated and straining to pass stool, but straining in the litterbox is more often a sign of urethral obstruction. Urethral obstruction is a potentially life-threatening condition caused either by urethral stones or by urethral plugs (the latter are made of a soft material containing minerals, cells, and mucus-like protein).

Male cats (neutered or intact) are at greater risk for urethral obstruction than females because their urethra is longer and narrower. This is a true medical emergency, and any cat suspected of suffering from this condition must receive immediate veterinary attention. Once the urethra becomes completely blocked, the kidneys are no longer able to remove toxins from the blood or maintain a balance of fluids and electrolytes in the body. Without treatment, death frequently occurs when these imbalances lead to heart failure — often in less than twenty-four to forty-eight hours.

Treatment of this condition involves dislodging the obstruction, usually accomplished by flushing a sterile solution through a narrow tube placed into the urethra. Once the obstruction is removed, further treatment depends upon the condition of the cat. Dehydration and electrolyte imbalances are treated with intravenous fluid therapy. Antibiotics may be given to prevent or treat infection, and drugs that help restore bladder function are sometimes recommended.

For cats who continue to experience urethral obstruction despite medical treatment, there is a surgical procedure called a perineal urethrostomy. Since side effects of this surgery can include bleeding, narrowing at the surgical site, urinary incontinence, and a greater incidence of urinary tract infection, it is usually considered only as a last resort.

Feline idiopathic cystitis

Feline idiopathic cystitis (FIC)—also called interstitial cystitis—is the most common diagnosis in cats less than 10 years of age with lower urinary tract disease. The disease is not fully understood and may involve several body systems in addition to the urinary system.

Feline idiopathic cystitis is a diagnosis of exclusion, meaning that it is a diagnosis made after all diseases that might cause similar signs are ruled out. There is no specific diagnostic test for FIC. Stress and diet changes can increase the risk of FIC. As many as 40-50% of cats will have another episode of FIC within one year, but veterinarians cannot predict which cats will have relapses. The disease can be chronic and very frustrating for the cat, the owner, and the veterinarian. The current goals of treating cats with FIC are to decrease the severity and frequency of episodes. There are numerous medical treatments that result in variable degrees of success but often the veterinarian will start by addressing any behavioral issues. This may include feeding only canned food and reduction of stress.

Other causes

Diseases such as diabetes and hyperthyroidism (overactivity of the thyroid gland) can cause lower urinary tract disease in cats.

Although they are much less common causes, FLUTD can also be caused by tumors of the urinary tract, congenital abnormalities (birth defects), or injury to the urinary tract or spinal cord.

What can I do at home to prevent future occurrences of FLUTD?

Depending on the underlying cause for FLUTD, the clinical signs may never, or only occasionally, reoccur. However, recurrence is more common with FIC. To help reduce the chances of recurrence:

  • Feed small meals on a frequent basis.
  • Consult with your veterinarian about the best diet for your cat. Many commercial diets are acceptable, but some urinary conditions respond better to specialized diets. Canned food may be preferred.
  • Provide clean, fresh water at all times.
  • Provide an adequate number of litter boxes (usually one more than the number of cats in the household) with the type of litter that the cat(s) prefer
  • Keep litter boxes in quiet, safe areas of the house.
  • Keep litter boxes clean – they should be scooped twice a day and the litter changed weekly (or more often as needed).
  • Minimize major changes in routine.
  • Reduce stress.

This information is based on our client brochure, available in English and Spanish.


What Are The Symptoms of Urinary Tract Problems in Cats?

The lower urinary tract includes the bladder and urethra. Urine is formed and stored in the bladder until it flows out of your cat's body through the urethra.

When those body parts get infected or obstructed, your cat won't be able to urinate normally. You might notice some of the following symptoms when your cat has a UTI or other urinary tract problem:

  • Frequent urination, but only passing a small amount of urine
  • Urinating outside the litter box
  • Blood in the urine
  • Straining to urinate
  • Crying out in pain while urinating
  • Increased licking of urinary opening

If you notice these symptoms, you should call your vet right away to discuss them. This could be a sign that your cat needs immediate medical attention.


When cats are happy and healthy, they use the litter box for both urinating and defecating. However, if your cat starts exhibiting any of the following behaviors, she may be experiencing feline urinary stress or feline lower urinary tract disease (FLUTD):

  • straining when urinating
  • incontinence / loss of bladder control
  • urinating outside of the litter box
  • crying out in pain while urinating or attempting to urinate
  • licking genital area
  • reduced appetite

Most cats will show the above signs when they have reached their stress limit or are having a medical issue, so some earlier signs of stress might be that your cat is hiding more, is less affectionate, is changing her eating behavior, or is only urinating or defecating in her litter box (not both). However, some cats may show signs of urinary stress without any warning. As soon as a cat shows signs of urinary stress, it is important to call your veterinarian to determine if a visit is needed or if you should try some interventions at home first.


Watch the video: Why Is My Cat Peeing In The Sink? Cats Peeing Outside The Litter Box Is Disgusting (July 2021).