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

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

What Type of Litter Is Best for Cats? 9 Vet Approved Choices

Litter box duty is the least favorite daily job of every cat parent, and it’s important to find the right type of litter....

My Cat Ate a Bee! Here’s What to Do (Vet Answer)

Cats are curious creatures with lightning-fast reflexes and sharp senses. If your cat is an avid hunter, you may have noticed them trying...

Cat Body Condition Score: What Is It & How To Work It Out

The Body Condition Score (BCS) is a quantitative method for evaluating body fat. Think of it as the animal equivalent of the Body...

What’s the Price of Cat & Kitten Vaccinations in Australia? (Costs in 2025)

Whether you have an indoor or outdoor feline, you must keep up with their vaccinations. Vaccinations and booster shots keep numerous preventable health...

More related

How to Calm a Stressed Cat After Moving: 17 Vet-Verified Tips

Did you know that moving is considered one of the most stressful life events humans can go through? It’s true, but it’s not...

Cat Strokes: Signs, Causes, Diagnosis, Care & FAQ (Vet Answer)

Although relatively rare, cats experience strokes. A stroke occurs when there is an abrupt interruption in the blood supply to your cat’s brain....

7 Skinny Cat Breeds: Top Choices for Your Home (With Info & Pictures)

All cat breeds have their own unique shape. Some are bulkier and naturally more muscular, like the Maine Coon, while others are smaller...

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...

Keep reading

Are Emotional Support Vests Necessary for Cats? Vet-Verified Recommendations & FAQ

Emotional support animals (ESAs) are one type of assistance animals, however, they are different from service animals and, therefore, are subject to their own requirements and considerations. They are any animal species with no specific training that provide comfort and...

a woman and her cat with harness and leash sitting on the bench at the park

Can Cats Eat Graham Crackers? Vet-Reviewed Facts & Alternatives

Cats are known for their picky eating habits, but they can sometimes surprise us by nibbling on unexpected treats. One strange item that seems to get many cats’ attention is graham crackers, but are they safe for cats to eat?...

Can Cats Eat Graham Crackers

8 Best Cat Foods for Picky Cats in the UK in 2025: Reviews & Top Picks

Cats generally know what they do and don’t want, and not much can change their minds. This can pertain to where they want to sleep, who they want to cuddle with, and what they want to do during their day....

siamese kitten eating from a stainless bowl

What Are Normal Vital Signs for Cats? Vet-Approved Tips & FAQ

A cat’s vital signs can help determine how the feline is doing, as well as point out any potential problems. For instance, if a cat’s heart rate is too fast or too slow, it may indicate an underlying issue. Of...

scottish fold cat checked by vet

Can Cats Drink Soda? Vet Approved Nutrition & Safety

Are you a soda lover who can’t go a day without a big, tall glass of your favorite fizzy drink? If you’re also a cat owner, maybe you’ve seen your cat drink some leftover soda you left in a glass....

Can Cats Drink Soda

How to Identify and Stop Food Aggression in Cats: Vet-Reviewed Advice

Cats are in touch with their wild side. You’ll see examples in their behavior, which may seem inappropriate in the home setting, but served them well at a different time. Survival is the primary motivator for most instinctive behaviors, which...

siamese cat eating food from bowl at home

10 Best Wet Cat Foods in the UK in 2025: Reviews & Top Picks

As cat lovers, we want what’s best for our kitties, and that involves feeding healthy cat food that provides all the necessary ingredients cats need to thrive. When it comes to wet cat food in the UK, you’ll see plenty...

orange cat eating wet food

Why Do Cats Eat and Chew on Paper? 4 Reasons for This Behavior

Believe it or not, cats chewing on cardboard and paper is a problem that some pet parents encounter. Sometimes, owners mistake their cats playing with the toilet roll as a desire to eat it. In other cases, the cat might...

Cat eating paper