Jelly-Like Blood in Cat Pee: Causes and Next Steps

Name: Jelly-Like Blood in Cat Pee: Causes and Next Steps
Creator: Dr. Zubair Khalid

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

Jelly-like material in your cat's urine is almost always blood clots, mucus, or both, and it points to inflammation or bleeding somewhere in the bladder or urinary tract. It is not normal, and it usually means your cat needs to see a veterinarian soon. The good news is that many causes are treatable, and the sooner you act, the better your cat's odds of a quick recovery.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

Jelly-like urine is most often clotted blood or mucus shed from an inflamed bladder lining, and it should be checked by a veterinarian.
A blocked urethra (especially in male cats) is a life-threatening emergency. If your cat is straining and passing little or no urine, go to an emergency clinic now.
Common causes include feline idiopathic cystitis, urinary stones, urinary tract infection, and, less often, tumors or urinary foreign bodies.
Bring a fresh urine sample if you can, but do not delay care to collect one.
Never give human pain relievers such as ibuprofen or acetaminophen to a cat. They are toxic.

What Jelly-Like Material in Cat Pee Looks Like

Normal cat urine is clear to pale yellow. It may darken slightly with concentration, but it should not contain visible solid or gelatinous material.

What owners describe as "jelly" usually falls into a few patterns:

Small reddish or brown clumps suspended in urine
A stringy, gelatinous blob, sometimes pink or rust colored
A coating of slime on the litter or in the collection container
Drops of thick material passed after normal-looking urine

This material is typically clotted blood or mucus produced by an irritated bladder wall. Blood that sits in the bladder for a while can clot, and clots look like jelly. Mucus is a normal secretion of the bladder lining, but inflammation makes the lining produce much more of it.

If you are seeing blood without obvious jelly, our guide to Cat Peeing Blood: What Should You Do? walks through the same decision points.

Causes of Jelly Blood in Cat Pee

Several conditions can produce blood clots, mucus, or both in urine. The table below groups them by how they usually look and how quickly you need to act.

Cause	Typical clues	How urgent
Feline idiopathic cystitis (FIC)	Straining, frequent small urinations, blood, often in a stressed indoor cat	Same-day vet visit, emergency if blocked
Urinary stones (urolithiasis)	Blood, pain, sometimes crystals on prior urinalysis	Same-day vet visit, emergency if blocked
Urinary tract infection	Blood, mucus, strong odor, sometimes accidents outside the box	Same-day to next-day vet visit
Bladder or kidney bleeding	Persistent blood, clots, sometimes anemia	Same-day vet visit
Urinary foreign body	Long history of urinary signs that do not respond to treatment	Same-day vet visit
Bladder or ureteral tumor	Older cat, weight loss, blood that keeps coming back	Prompt vet visit, often referral

Feline Idiopathic Cystitis

Feline idiopathic cystitis, often called FIC, is the single most common cause of lower urinary tract signs in cats. It accounts for 55 to 65 percent of feline lower urinary tract disease [1]. The hallmark signs are urinating more often, urinating outside the box, blood in the urine, and straining to urinate [1].

FIC is linked to stress and to complex interactions between the bladder, nervous system, adrenal glands, and the cat's environment [2]. Cats with FIC also show changes in the bacterial population of their urine, with more Firmicutes and Bacilli and fewer Proteobacteria compared with healthy cats [3]. This does not mean FIC is caused by an infection. It means the bladder environment is different in these cats.

Urinary Stones

After FIC, urolithiasis (urinary stones) is the second most common cause of feline lower urinary tract disease [2]. Stones can scrape the bladder lining, causing bleeding and mucus production. Stones can also lodge in the urethra and block urine flow, which is an emergency.

Urinary Tract Infection

Most urinary infections in cats are caused by bacteria that enter through the urethra and travel to the bladder [4]. Risk factors include incomplete bladder emptying, dilute urine, sugar in the urine (often from diabetes), older age, a weakened immune system, and other diseases such as chronic kidney disease or hyperthyroidism [4]. Healthy adult cats are relatively resistant to these infections [4].

Less Common Causes

Bleeding can also come from the kidneys or ureters. One report described a cat with severe bleeding from a ureterovesical junction that caused urethral obstruction and anemia [5]. Urinary foreign bodies are another possibility. One cat had three years of recurrent urinary signs from a retained foreign body in the urethra and bladder that did not improve with anti-inflammatory drugs or antibiotics [6]. Tumors such as urothelial carcinoma are uncommon but possible, especially in older cats with blood that keeps returning [5][7].

If your cat has blood in the urine but seems completely normal otherwise, see Cat Blood in Urine but Acting Normal: Causes and Next Steps.

Red Flags: When Jelly Blood in Cat Pee Is an Emergency

Some urinary problems become life-threatening within hours. Go to an emergency clinic immediately if you see any of these:

Your cat is straining to urinate with little or no urine coming out
Your cat is crying, pacing, or licking the genital area constantly
The abdomen looks swollen or feels firm
Your cat is vomiting, drooling, or breathing fast
Your cat is weak, wobbly, or collapsed
You see only drops of bloody or jelly-like material and no real urine

Male cats are at higher risk of urethral blockage because their urethra is longer and narrower. A complete blockage stops the kidneys from clearing waste, and a cat can become critically ill in under 24 hours. Do not wait to see if it passes.

If your cat is passing urine normally but you see blood, that is still urgent but usually not an immediate emergency. Call your veterinarian the same day.

Safe Things You Can Do at Home While You Wait

You cannot treat this at home, but you can make the wait safer and give your vet better information.

Collect a urine sample if you can do it without stress. A clean, dry container with a lid works. Refrigerate it and bring it within a few hours.
Do not squeeze or press on your cat's belly. You could rupture the bladder if it is blocked.
Do not give any human medication. Ibuprofen and acetaminophen are toxic to cats, and human antibiotics are the wrong drug and dose.
Offer fresh water and wet food to encourage drinking. More dilute urine is easier on an irritated bladder.
Keep your cat indoors and away from stairs or high furniture if they seem unsteady.
Note the time, amount, and appearance of each urination. Photos of the litter clumps help.

If your cat stops eating, hides, or seems painful, skip the wait and call an emergency clinic.

What Your Veterinarian Will Check and Test

Your vet will start with a physical exam, including palpating the bladder to see if it is small, large, or painful. Then expect some combination of the following.

Urinalysis

This is the core test. It checks for blood, white blood cells, bacteria, crystals, and urine concentration. A urine sample can be collected by free catch, by cystocentesis (a needle through the abdominal wall into the bladder), or by catheter. Cystocentesis gives the cleanest sample for culture.

Urine Culture

If infection is suspected, a culture identifies the bacteria and which antibiotics will work. This matters because urinary infections in cats often have underlying triggers such as incomplete bladder emptying or diabetes [4].

Blood Work

A complete blood count and chemistry panel check for anemia, kidney values, blood sugar, and thyroid levels. Recent research also suggests the neutrophil-to-lymphocyte ratio on a blood count may help distinguish cats with feline idiopathic cystitis from healthy cats, though this is not yet a standard diagnostic test [1].

Imaging

X-rays and ultrasound look for stones, bladder wall thickening, tumors, and structural problems. Ultrasound is especially useful for the bladder and kidneys. In one case, imaging and cystoscopy were needed to find the source of severe bleeding from a ureter [5].

Advanced Testing

If the cause is still unclear, your vet may recommend cystoscopy (a camera into the bladder), contrast imaging, or referral to a specialist. These are usually reserved for cats with repeated or severe bleeding.

For a deeper look at how infection and stones are sorted out, see Why Is My Cat having blood in urine? UTI and Bladder Stones Diagnosis.

Treatment Depends on the Cause

Treatment is not one-size-fits-all. Your vet will tailor it to what the tests show.

FIC: reducing stress, increasing water intake, and sometimes pain medication or bladder-protective drugs. Environmental changes matter a lot for these cats [2].
Infection: an antibiotic chosen from culture results [4].
Stones: may dissolve with diet or need surgical removal, depending on the stone type.
Bleeding from the kidney or ureter: may need advanced procedures. One cat with severe renal bleeding was treated with sclerotherapy, a procedure that injects medication to stop the bleeding [5].
Foreign body: removal, sometimes with specialized instruments under imaging guidance [6].
Tumor: referral to an oncologist for staging and options [7].

Your veterinarian will calculate any medication dose based on your cat's weight and health. Never adjust or repeat a dose on your own.

Preventing and Monitoring Urinary Problems

You cannot prevent every cause, but you can lower the odds and catch problems early.

Feed wet food or add water to meals to keep urine dilute.
Keep multiple water bowls and consider a fountain.
Keep litter boxes clean and provide one box per cat plus one extra.
Reduce stress from changes, new pets, or moves. FIC is strongly tied to stress [2].
Watch for early signs: more trips to the box, smaller clumps, licking, or accidents.
Keep routine vet visits, especially for older cats and cats with diabetes, kidney disease, or hyperthyroidism [4].

If your cat has had one episode of urinary bleeding, ask your vet how often to recheck urine. Some cats need monitoring every few months.

Limitations and When to Contact a Veterinarian

This article cannot tell you what is causing your cat's symptoms. Only a veterinarian who examines your cat and runs tests can do that. Individual cases need a veterinarian.

Contact your veterinarian the same day if you see jelly-like material, blood, or mucus in the urine, even if your cat seems fine.

Go to an emergency clinic now if your cat is straining with little or no urine, crying in pain, vomiting, or acting weak.

Schedule a routine visit if your cat has had urinary signs before and you want to discuss monitoring or prevention.

For more on when blood in urine needs urgent care, see Cat Blood in Urine: Causes and When to Rush to the Vet.

Frequently Asked Questions

Is jelly-like material in cat urine always blood?

No, but it usually is. Clotted blood and mucus look very similar in urine, and both come from an inflamed or injured bladder lining. A urinalysis is the only way to tell them apart.

Can a urinary blockage clear on its own?

It can, but you cannot predict which cats will recover without help. A blocked cat can become critically ill in less than a day, so treat any straining with no urine as an emergency.

Will my cat need surgery for this?

Most cats do not. Surgery is reserved for stones that will not dissolve, foreign bodies, some tumors, and certain bleeding problems. Your vet will discuss options after testing.

Can stress really cause blood in my cat's urine?

Yes. Feline idiopathic cystitis is strongly linked to stress and to how the bladder, nerves, and adrenal glands interact with the cat's environment. Reducing stress is a real part of treatment.

How long does treatment take?

It depends on the cause. Infections often improve within days of starting the right antibiotic, while FIC and stones may need weeks to months of management. Your vet will set a recheck schedule for your cat.

References

Neutrophil-to-Lymphocyte Ratio as a Promising Non-Invasive Biomarker for Diagnosis of Feline Idiopathic Cystitis in Cats. Animals : an open access journal from MDPI, 2025.
Serum and Urine Nerve Growth Factor and Glycosaminoglycan Levels in Obstructive and Non-Obstructive Feline Urolithiasis and Interstitial Cystitis. Veterinary medicine and science, 2026.
Characterization and comparative analysis of urinary bacterial microbiome profiling in healthy cats and cats with feline idiopathic cystitis. Scientific reports, 2026.
Infectious Diseases of the Urinary System of Cats - Cat Owners. Merck Veterinary Manual.
Percutaneous cystoscopically and fluoroscopically guided sclerotherapy for treatment of renal hematuria in a cat. Journal of veterinary internal medicine, 2026.
Fluoroscopy-guided basket retrieval of a chronic urinary foreign body in a cat. The Canadian veterinary journal = La revue veterinaire canadienne, 2026.
Urothelial Carcinoma in a Cat with Bilateral Ectopic Ureters. Animals : an open access journal from MDPI, 2026.