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.

Why Did My Cat Throw Up? 8 Vet-Reviewed Likely Reasons

Share

a cat that feels sick and seems to vomit

When your cat throws up, it can send your mind into overdrive: What’s going on? Do I need to take them to the vet? What can I do for them? The solution starts with identifying why your cat is vomiting in the first place. There are a few different reasons that they could be throwing up, and not all of them warrant a trip to the vet.

So, keep reading, and we’ll help you figure out what’s going on and get your cat feeling better in no time.

divider cat faces 2 oct 2024

The 8 Reasons Why Cats Throw Up

1. Hairballs

Seriousness Low
Likelihood Common

Hairballs are normal occurrences for your cat, and while it can be uncomfortable to watch, there’s typically not much to worry about. Cats do this to clear out any hair or other materials that they ingest while licking themselves. While most of this hair will pass through their digestive tract, sometimes there’s just too much, and your cat’s body regurgitates it as a hairball.

However, while some hairballs are normal, if your cat is vomiting up more than one hairball a week, you should consider changing their diet or taking them to a vet to see what’s going on.

Pros
  • Normal occurrence
  • Usually doesn’t make much of a mess
  • Can be managed with regular grooming
Cons
  • You can’t stop it completely

2. Eating Too Much Too Quickly

cat eating food from the bowl
Image Credit: Roman Samsonov, Shutterstock
Seriousness Low
Likelihood Common

Cats can be just like us, and sometimes they’re just too quick to scarf up their food. If this sounds like your cat, there’s a good chance it’s what is causing them to vomit. Try slowing down their food intake by giving them less at a time and spreading out their meals throughout the day. You can also try a unique pet food bowl that forces them to slow down while they’re eating.

Either way, if this is what your cat is going through, it’s a preventable problem and not something that you should have to deal with for too long!

Pros
  • Treatable
  • Not a serious condition
Cons
  • Can be frustrating to deal with

3. Food Allergies

Seriousness Medium
Likelihood Common

Some cats can’t tolerate different foods, and if you just switched your cat’s food and they’re acting up, that’s likely what’s going on. It’s a treatable condition because all you need to do is change their diet, but it can be frustrating trying to find something that works for them.

Also, sometimes the special diets that they need to avoid their allergies can be expensive, and it’s a lifelong condition that they’ll have to deal with. If you can’t figure out the specific food allergy that is irritating your cat, you might need to take them to the vet to figure out what’s going on.

Pros
  • Treatable
  • Usually not a serious problem
Cons
  • Special diets can get expensive
  • May require a visit to the vet

4. Ate Something That They Shouldn’t Have

tired or sick cat
Image Credit: Kginger, Shutterstock
Seriousness Medium to severe
Likelihood Common

It doesn’t matter how often we shoo our cats away, sometimes they start chowing down on things that they should avoid. If you have a cat that likes to eat non-food items, it could easily cause vomiting.

The seriousness of the situation entirely depends on what they ate. Something like grass isn’t a huge concern, though it will induce vomiting, while other objects can block their digestive tract or lead to more severe side effects.

Pros
  • Preventable condition
Cons
  • Must hide all the things that they might eat
  • Serious if they eat the wrong thing

5. Intestinal Parasites

Seriousness Severe
Likelihood Common

If you have an outdoor cat or if your cat ate raw meat, they might have an intestinal parasite problem. This is a frequent occurrence for outdoor cats, but it’s rare for indoor ones.

Either way, it’s a treatable condition, but they will need a vet visit and the right medication. It can quickly escalate into a far more serious condition without treatment.

Pros
  • Treatable condition
  • Once treated, it doesn’t come back often
Cons
  • Requires medical treatment

6. Inflammatory Bowel Disease

ginger cat being examined by a vet
Image Credit: Andy Gin, Shutterstock
Seriousness Medium to severe
Likelihood Uncommon

Inflammatory bowel disease, also known as IBS, is a condition that can lead to your cat vomiting and having diarrhea throughout the day because they can’t handle the food that they’re consuming.

If you have a cat with IBS, you should take them to a vet for specific guidance on how to get your cat’s condition under control. Chances are that they’ll need a specific diet, and it’s likely to cost more than regular cat food.

Pros
  • Treatable condition
Cons
  • Lifelong condition
  • May require an expensive diet
  • May require extensive diagnostic testing
  • May require medication during flare-ups

7. Poisoning

Seriousness Severe
Likelihood Rare

While intentional poisoning of a cat is rare, it can happen. However, what’s more likely is that your cat ate something poisonous to them. These can be items like chocolate or household plants.

If you suspect that your cat has ingested something poisonous, you need to take them to a vet as soon as possible for treatment. However, the good news is that once you treat it, it shouldn’t happen again!

Pros
  • Usually a one-off condition
Cons
  • Serious condition
  • Requires immediate medical attention

8. Cancer

vet using tablet
Image Credit: PeopleImages.com – Yuri A, Shutterstock
Seriousness Severe
Likelihood Rare

There’s no doubt that cancer is the worst-case scenario among the reasons that your cat is vomiting, but you can take solace in the fact that it’s a condition that typically only affects older cats. Still, there’s no denying that it’s a potential cause.

For a proper diagnosis, you’ll need to take them to a vet, who will go over all the possible treatment options.

Pros
  • None
Cons
  • Serious condition
  • Requires expensive medical treatment

divider single cat paw oct 2024

When Should I Be Concerned About My Cat Vomiting?

You are free to use this image but we do require you to link back to Catster.com for credit

Anytime that your cat is throwing up repeatedly is a cause for concern. If they only vomit once, twice, or even three times, you’re probably fine. However, if it happens any more than that, you should reach out to a vet.

In addition to repeated vomiting, if any of these symptoms are present, you should take your cat to the vet immediately:

  • Vomiting blood
  • Pain or distress
  • Blood in stool
  • Fever
  • Weakness or lethargy

divider cat faces oct 2024

How Can I Treat My Cat for Vomiting at Home?

The first thing that you need to do if your cat is vomiting is to remove their food source for about 12 hours. During this time, only give them access to about 1 tablespoon of water every 30 minutes, or provide them with access to an ice cube.

For the next 12 hours, only give them small amounts of bland cat food. Slowly up the amount until they’re back to their regular feeding schedule. If they resume vomiting after eating, you should take them to a vet for further evaluation.

Call your vet so they can give you more advice and tips on how to help your cat.

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

What Does Hairball Vomit Look Like?

If your cat is vomiting and you’re unsure if it’s a hairball or something else, the easiest way to figure it out is to look at it. While it’s a bit unpleasant, it’s usually easy to tell the difference.

Hairball vomit looks like a wad of fur tightly bunched into a cylinder-type shape due to traveling up through their throat, but other shapes are fine too. Keep in mind that while it’s mostly hair, it’s still going to be wet.

Our Favorite Enzyme Cleaner 

The Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray is our favorite enzyme cleaner out there. It permanently removes even the very worst kitty stains and smells, leaving your home fresh and clean! Click here to learn more about this amazing product and get yourself a bottle.

Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray
  • ADVANCED ENZYMATIC CLEANER - Penetrates the most stubborn smells and stains at the deepest molecular...
  • FOR ANY MESS, ON ANY SURFACE - This pet odor eliminator cleans your carpets, floors, furniture,...
  • FRESH, NATURAL ODOR - Our unique formulation doesn't rely on dangerous or unpleasant chemical...

At Catster, we’ve admired Hepper for many years, and decided to take a controlling ownership interest so that we could benefit from the outstanding products of this cool cat company!

divider cat paw scratch oct 2024

Conclusion

Nobody likes to see their furry friends get sick, but if you own a cat, it’s only a matter of time until you see them vomit. Now that you know what to look for and common causes, you’ll know if you can treat the problem yourself or take them to the vet!

See also:


Featured Image Credit: chie hidaka, 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

Why Healthy Cats Still Vomit Sometimes (And How to Respond)

A cat that just vomited needs a specific kind of care, and the feeding decisions you make in the next few hours actually...

Scientists May Have Found the Missing Piece in Feline Kidney Disease

One of the most upsetting parts of caring for an elderly cat is the knowledge that there is a very high chance that...

Ask Dr. Paola – Help! I Am Worried My Cat Isn’t Getting Enough Water! (April 6, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

The 10 Common Causes of Sudden Death in Cats (And Which Ones Are Preventable)

Most cat owners don’t think much about heart disease, internal hemorrhage, or viral infections until they’re staring at an empty bed. Sudden death...

More related

How Much Do Siamese Cats Purr? Facts & FAQ

Siamese cats are known for their gorgeous pointed coats and sunny personalities. The loveable cats are affectionate, sweet, and love interacting with humans....

Catster Photo Contest: Cats of the Week Winners (October 23, 2025)

Every week our team gets the privilege of sorting through our readers photos to choose what cats will win this weeks contest! See...

What Can My Cat Eat at Thanksgiving? 16 Vet Reviewed Do’s & Don’ts

Anyone who thinks dogs are the biggest beggars of food in the pet world clearly hasn’t met a cat! However, not all people...

Why Do Cats Like to Sit on Paper? Our Vet Explores 4 Likely Reasons

Whether it is the daily newspaper print or that pile of documents on your desk, it seems like your kitty does not leave...

Keep reading

Why Is My Cat Panting in the Car? 5 Vet-Reviewed Reasons

Unlike dogs, most cats do not like to travel with you in the car. Whether it’s the fear of the unknown or the tight space, cats can do some weird things when riding down the road. Your cat might meow,...

cat with head out car window travel

Can Cats Eat Banana Bread? Vet-Approved Facts & FAQ

There are precautions we need to take when sharing tasty treats with our feline friends. Sometimes, our food is a healthy snack, and other times, it can be harmful, so it’s essential to be informed before sharing new food with...

Can Cats Eat Banana Bread

How to Trim a Cat’s Nails (Who Won’t Cooperate): 12 Vet-Approved Tips

Trimming a cat’s nails can be an important part of feline maintenance. Cats use their claws for hunting, defense, and balance. While they do scratch them against abrasive surfaces like trees, fences, walls, and even scratch posts, they may still...

trimming nails of cat

Temptations Cat Treats Review of 2026: Recalls, Pros & Cons

Temptations Cat Treats: Review Summary A popular American cat treat, Temptations is manufactured by MARS, the same company that produces Whiskas, Greenies, Sheba, and Eukanuba. Temptations treats are genuinely loved by many cats and their owners. They’re an affordable treat,...

Temptations Cat Treats Review

Why Do Cats Like Running Water? 6 Interesting Vet-Reviewed Reasons

Most cats aren’t big fans of water, especially when it comes to bathing. They typically shy away from it and many owners also seem to think that their pets don’t drink nearly as much as they should. However, there’s one...

cat drinking from faucet

Why Doesn’t My Cat Like To Be Held Or Picked Up? 6 Vet-Reviewed Reasons

No two cats are the same. Just because you’ve owned one in the past or have known somebody else who has owned a cat that loves to be cuddled, that does not mean that all cats like to be picked...

cat doesn't want to be held

Can Cats Eat Broccoli? Vet-Reviewed Nutritional Facts & FAQ

It is an unlikely scenario that you would want to feed your cat broccoli or that your pet would come over and sniff the dinner plate with broccoli present, but for those wanting to know if cats can eat this...

Can Cats Eat Broccoli

Is Peperomia Toxic to Cats? Vet-Reviewed Houseplants Examined

Cats are absolute fiends when it comes to plants. After spending good money on a plant, we always find a nibble on a leaf or an entire plant uprooted from its pot. Even worse, it always puts us cat owners...

Catster_Is Peperomia Toxic to Cats

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.