Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How to Tell If Your Cat Has Internal Bleeding: Our Vet Explains the Signs

tired sick cat lying on bed

Internal bleeding is a serious condition that requires immediate medical attention. It is often the result of external trauma, such as getting struck by a car or falling from a high place. Post-operative complications, even from simple surgeries, can also lead to internal bleeding, as can tumors that grow into blood vessels and spontaneously rupture.

Internal bleeding is generally a medical term that is reserved for large amounts of blood actively being lost into the abdominal cavity. This is different from, say, microscopic blood loss from a urinary tract infection or from diarrhea due to gastrointestinal irritation. Internal bleeding is by no means unique to cats. However, as cats are good at hiding their illness, it is critical to know what signs to look for that might indicate your cat has internal bleeding and what to do about it.

It can be difficult to tell if a cat has internal injuries, so here are a few tips to identify internal bleeding in cats. Chances are that it is an emergency and should be treated as such. If you suspect that your cat has internal bleeding, get them to a veterinarian as soon as possible!

divider single cat paw oct 2024

The 5 Signs of Internal Bleeding in Cats

1. They Have Pale Mucus Membranes

An easy at-home way to look for possible blood loss in your cat is to check their gum color. Lift their lip, and look at their gums and tongue. Are they pink? Light pink? Or are they pale or even white?

Pale or white gums are definitely not normal and can indicate blood loss and an emergency situation. It can be helpful to look at your cat’s gums and tongue color when they are feeling well for comparison’s sake, so in an emergency situation, you know what color it would normally be.

Another area that can be checked is your cat’s paw pads. Paw pads should normally be pink, even for cats that don’t have lots of pigment in their paw pads. If suddenly the color becomes pale or white, this can indicate blood loss.

Some vets go a step further and use a subjective test called capillary refill time—in which the gums are pressed on lightly until they blanch, and the time it takes for the blood to refill and color to return to normal is then measured (in seconds). Ordinarily, the time it takes to refill should be 1–2 seconds, maximum. Anything slower than that is an indication that something is wrong.

If you are concerned about the health and well-being of your pet, seek veterinary advice for the best course of action.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money


2. They Are Breathing Fast

In cats, another check for blood loss can be to look at their breathing. If there are fewer red cells to carry oxygen in the bloodstream, the respiratory system has to make up for this by breathing faster, to get more oxygen circulating in the blood.

It is helpful to know what your cat’s normal breathing rate is at home, both in terms of how many breaths they take per minute and what their chest movements look like during the process. Note that breathing should not be checked while a cat is purring, as purring involves a very different type of breathing, which can give misleading results.

Cats that may be experiencing internal bleeding will usually exhibit a combination of faster-than-normal breathing, increased effort to breathe (including abdominal contractions or exaggerated chest movements), open-mouth breathing, or gasping. Each of these signs is potentially serious and generally means a cat needs immediate veterinary attention.


3. They Are Not Eating

If an otherwise healthy cat suddenly stops eating, it is usually an early indicator that they are ill and in poor health.

Although this is not specific to internal bleeding, a cat with severe blood loss generally will not feel well enough to eat. If your cat has not previously had any changes with their appetite, this can be a key indicator that they need to see a veterinarian.

Lazy and well-fed cat looking for food and not eat
Image Credit: Elena Kutepova, Shutterstock

4. They Are Lying Down or Acting Lethargic

Blood loss, especially in the case of internal bleeding, means that less oxygen is available for tissues and organs to utilize for normal metabolic activities. This lack of oxygen circulating can, therefore, create a sense of tiredness or lethargy. Similarly, cats may lie down more frequently or only walk a few steps before needing to stop.

Some cats may simply hide, sometimes in places they normally wouldn’t. Others may change their sleeping patterns or show a lack of interest in playing.

All of these signs can indicate a serious illness, including possible internal bleeding, and ought to be treated urgently for further investigation.


5. They Are Bleeding From a Recent Surgical Incision

It may sound like a no-brainer, but if your cat has recently had surgery, you should plan to monitor the surgical incision as it heals. Many times, your vet will recommend you check on it at least once daily, in addition to other specific instructions.

In the first few days after surgery, especially before the skin has healed back together, any amount of blood coming from the incision should be a cause for concern. If this happens, contact your vet immediately. The larger the amount of bleeding you notice, the more concerning it should be.

If you have any concerns about your cat or their health, we recommend you contact your vet directly.

vet examining a cat in the clinic
Image Credit: Maria Sbytova, Shutterstock

divider 2 cats

Conclusion

While internal bleeding in cats isn’t a common concern, it is a condition worth knowing about because of how dangerous it can be. You should especially know what signs to look for with your own cat.

Remember, this is a life-threatening condition and if suspected, requires immediate veterinary attention. Fortunately, it is often treatable, depending on the cause. The sooner it is diagnosed, the more effective treatment tends to be.


Featured Image Credit: Natata, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

How Cats Improve Your Mood: Olga’s Ways of Relieving My Stress

Hi, I’m Christopher! Read my introduction to learn more about me and my silly Russian Blue cat, Olga. Researchers have studied how cats...

Burmese Cat Health Problems: 14 Vet-Verified Issues

Bringing a cat into your home is always a fun and exciting prospect, but it also involves learning a lot about your new...

Do Cats Need Sunscreen When Going Outside? Vet-Approved Facts

Applying sunscreen to a cat may sound a little messy or unnecessary, but some breeds and those with light-colored coats could benefit from...

How Much Water Does a Kitten Need Per Day? Vet-Approved Facts & Tips

If you’re a new kitten owner, you may not know that many cats drink too little water to keep themselves properly hydrated. So,...

More related

How Long Does Grief Last After Losing A Cat? 7 Methods Can Help

Cats and humans can form deeply meaningful friendships with each other. So, it’s understandable and completely normal to experience grief after the loss...

Zumalka Pet Supplement Review 2025: A Detailed Look

Seeing your beloved pet struggle with illness is never easy, no matter how minor or severe the issue is. Often, we as pet...

Cat’s Life Saved Twice: Garbanzo Gets a New Lease on Life (with Video)

Every now and then, you come across a story that hits you right in the feels, and this week, that story is all...

6 Cat Litter Box Mistakes To Avoid

Dr. Meghan Herron, professor of veterinary behavioral medicine at the Ohio State University College of Veterinary Medicine (DACVB), says there are three common...

Keep reading

Are My Cats Playing or Fighting? 6 Vet-Reviewed Ways to Tell the Difference

Cats love to wrestle and play, but they also fight. Even if you have two litter siblings that have lived together their whole lives without any problems, there is a chance that something can change. One might get carried away,...

cats in grass

Why Do Cats Bunny Kick? 3 Vet-Reviewed Reasons

If you’ve owned a cat for at least 24 hours, you likely already understand the power of the bunny kick. It’s cute when a cat bunny kicks toys, but it’s not as cute when it becomes your arm, hand, foot,...

cat on lap

How to Trim the Nails of an Angry or Aggressive Cat (Vet-Approved Guide)

If you ask Mojo, the cat, about his favorite pastimes, nail trims would definitely NOT be on the list. Sleeping and eating are favorite pastimes, but nail trims are not. Mojo is a tough-looking former stray who now holds court...

Can a Cat Detect Seizures? – Anecdotal Reports and Scientific Facts in Perspective

Most people know that certain dogs qualify as service animals under the Americans with Disabilities Act (ADA). Dogs have the ability to detect seizures in humans before they happen, or respond once they begin, and these dogs are known as...

Domestic cat lying on owner's lap

How to Give a Cat Liquid Medicine: 8 Vet-Approved Tips

Your furry friend being sick makes you feel horrible, especially when there isn’t much you can do to make them feel better. It’s a bad experience for you and your cat, and when you have to give the cat liquid...

infusion of liquid medicine by a veterinarian

Can Cats Have CBD Treats? Vet-Verified Safety & Benefits Explained

You might’ve noticed all the hype about CBD (cannabidiol) in recent years. Maybe you’ve even tried it yourself. In people, CBD has been shown to help reduce or prevent seizures in some childhood epilepsy disorders as well as relieve insomnia...

Can Cats Have CBD Treats

Why Your Older Cat Is Not Using the Litter Box (7 Likely Reasons)

It can be a bit frustrating when your cat uses the bathroom outside the litter box, but it’s not uncommon for older cats to have accidents. A lot of changes occur as your cat gets up there in age. Caring...

cat lying beside litter box

Feline Hepatic Lipidosis – Fatty Liver Disease in Cats: Signs, Causes & Care

Hepatic lipidosis, more commonly known as fatty liver disease, is the most frequently seen form of severe liver disease in cats. The liver has many complex functions, including the production of chemicals necessary for digestion and the detoxification of the...

vet holding burma cat