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.

My Cat Just Threw Up Worms, What Do I Do? 7 Vet-Approved Tips

tired sick cat lying on bed

It is unsettling to see your cat throwing up worms. After all, worms are not something that you expect to see when your cat vomits. Such a sight can leave you in a panic about what to do.

To help ease your mind a bit, when a cat throws up worms, they’re likely roundworms, which are treatable. That said, if you notice your cat throwing up worms, take them to the vet immediately for treatment, especially if they’re a kitten.

Now that you know why your cat is probably throwing up worms, read on to explore treatment options, the types of cats that can be seriously affected, and important tips for keeping your feline roundworm-free.

divider 3 paws

What Are Roundworms?

Roundworms are common intestinal parasites found in cats. In fact, many cats will experience roundworms at some point in their lives. They look like cooked spaghetti noodles, and if your cat is infested, you’ll see them in your cat’s feces or vomit. A roundworm’s body is long with a whitish or tannish appearance and a cylindrical shape. They can grow 3 to 6 inches long and are easy to spot with the naked eye. Roundworms do not attach to the intestinal wall, but rather swim freely throughout the intestines.

Cats usually get infested with roundworms or other parasites from swallowing dirt with larvae or worm eggs (usually in feces). Another possibility is if your cat walks through an infected area with larvae or eggs that can get on their paws. When your cat cleans themselves, they will likely swallow the larvae or eggs. In kittens, the worms are passed by an infested mother cat through her milk. Kittens are commonly affected by roundworms and other parasites.

cats roundworms
Image Credit by: Todorean-Gabriel, Shutterstock

How Serious Are Roundworms to Kittens and Senior Cats?

Roundworms are not terribly serious in an adult cat, though prompt treatment is required to get rid of them as soon as possible. They are more life-threatening for kittens and senior cats and should be treated ASAP. If left untreated, kittens and senior cats may die.

For treatment, your veterinarian will prescribe a dewormer to kill the worms. Fortunately, spotting roundworms in your infested kitten, adult, or senior cat is easy, as they are usually visible within your cat’s vomit or feces.

Did you know there's an enzyme cleaner that does it all? The Hepper Advanced Bio-Enzyme Pet Stain & Odor Eliminator Spray permanently removes the very worst smells and stains (truly, everything you can imagine!), and they offer a 100% satisfaction guarantee! Click here to 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!

What Are Signs of Roundworm Infestation in a Cat?

A telltale sign is spotting the worms in your cat’s feces or vomit, but other signs can also point to roundworm infestation. Signs of roundworms are as follows:

  • Diarrhea with mucus
  • Vomiting (worms may be visible in the vomit)
  • Distended or enlarged belly (pot belly)
  • Weight loss
  • Coughing/pneumonia (if lungs are infected)
  • Possible intestinal obstruction (severe cases)
  • Dull coat

What Other Worms Can Infest Cats?

Roundworms are not the only worms that can affect your cat’s health. Hookworms, tapeworms, heartworms, and whipworms are all possibilities but also preventable and treatable.

  • Hookworms “hook” themselves to the lining of the intestinal wall, hence the name. Hookworms feed on the blood and tissue fluids, which can result in anemia. Hookworms can enter a host through the mouth or skin and are not visible to the naked eye.
  • Tapeworms have flat, segmented bodies that can reach up to 11 inches as adults. They anchor to the small intestines, and eventually, individual segments, called proglottids, break off from the main body of the worm and can be found on and around the anus, attached to fur underneath the anus, and on or in feces in the litter box.
  • Heartworms infest the heart and are spread through mosquitoes. Dogs are more susceptible to heartworms than cats; nonetheless, getting your cat on heartworm medication is imperative to keep them from infesting your cat.
  • Whipworms are not as common in cats as in dogs, but cats can still be infected. These worms resemble a “whip,” and an infestation can cause bloody diarrhea, or your cat may show no signs. However, the signs to look for are anemia, dehydration, and weight loss.

Are Worms Painful for Cats?

Yes, worms can be painful for your cat and can cause discomfort, especially depending on the type of worm your cat is infected with. Larvae migration that occurs in the liver, eye, stomach, or lungs can become inflamed, resulting in belly pain, nausea, breathing problems, and eye irritation due to excessive eye rubbing, a discharge, or squinting.

If you notice worms in the feces, vomit, or around the anus or if you see signs of worms in your cat, take them to the vet as soon as possible for treatment to prevent your cat from experiencing unpleasant clinical signs.

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

Can Humans Get Worms From Cats?

Unfortunately, yes, they can. Humans can get worms from coming in direct contact with cat feces with larvae, such as working in a garden without gloves, walking through contaminated soil, or children playing in sandboxes with contaminated feces. Practicing good hygiene is the best way to keep yourself protected.

The 7 Important Tips for Keeping Your Cat Worm-Free

You can do your part in preventing your cat from being infested with parasites by following some easy tips.

  • Don’t allow your cat to hunt rodents, as some may already be infested, which will also infest your cat.
  • Clean the litter box daily and ensure you remove all feces.
  • Use a disinfectant when cleaning.
  • Avoid feeding your cat raw meats, as larvae could be in the meat itself.
  • Avoid areas with overcrowded pets.
  • Keep your cat on a monthly heartworm and flea preventative.
  • Keep your cat indoors as much as possible.
man cleaning smelly litter box
Image by: xamnesiacx84, Shutterstock

divider 2 cats

Conclusion

Discovering your cat has worms is never pleasant, but luckily, there are certain measures you can take to keep your cat worm-free. Ensure that you keep your cat on monthly heartworm and flea prevention, keep your cat indoors as much as possible, don’t allow your cat to hunt rodents, keep the litter box clean daily, and practice good hygiene to protect yourself.

Following these steps will greatly reduce the chances of your cat getting worms. For kittens, it is important to take your kitten for a thorough exam to ensure no worms are present.


Featured Image Credit By: 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 Long Does CBD Stay in a Cat’s System & Is It Safe? Our Vet Explains

Cannabidiol, also known as CBD, has been growing more and more popular in recent years. It has many benefits for humans, such as...

Do You Have Cat Withdrawal While You’re Out of Town?

This picture is like, totally weird, right? Where’s the light dusting of fine hairs? Where are the two glowing little eyes either blinking...

European Burmese Cat Breed Info: Pictures, Temperament & Traits

When researching any cat, it is important to understand the different personality traits that go along with each breed. If you aren’t familiar...

Why Is My Cat Is Sitting Like a Person? Is That Normal?

Most cat owners can agree that there’s never a dull moment in a feline household. No matter your cat’s personality, they’re always up...

More related

PyroPet: We Interview Designer Thorunn Arnadottir About Her Cute and Creepy Cat Candles

I was the kid the after-school specials told not to play with fire. My unsuspecting parents, perhaps thinking I had a knack for...

Fungal Infections in Cats: Signs, Causes, and Treatment (Vet Answer)

A fungal infection can be uncomfortable for a cat and, in some cases, can have a serious impact on a cat’s health and...

5 Vet Approved DIY Slow Feed Cat Bowls (With Pictures)

Eating too quickly can lead to stomach upset and health problems, but it is commonly associated with dogs. That doesn’t mean some cats...

100+ Long-Haired Cat Names: Ideas for Soft & Fluffy Cats

When we get to hold our kittens for the first time, we instantly notice how incredibly soft they are! Although we can’t seem...

Keep reading

How to Help a Grieving Cat: 6 Helpful Tips

Figuring out why your cat acts the way they do can be a complicated matter. We know cats are different from humans, but they can experience some of the same emotions. For example, most animal behavior experts believe cats can...

Sick sad cat lying on the bed

Vitamin C for Cats: 5 Vet-Approved Food Sources

You can find vitamin C almost everywhere, from your morning OJ to your spring salad. In humans, a vitamin C deficiency is a serious problem, but is it the same with cats? You might be surprised to learn that most...

cat eating cantaloupe

Blue Buffalo Cat Food Review in 2025: Recalls, Pros & Cons

Review Summary Many pet owners might be surprised to learn that Blue Buffalo was only founded in 2003. Despite being a relatively young company, Blue Buffalo has quickly carved out a name for itself as one of the premier manufacturers...

Blue Buffalo Cat Food Review

Do Cats Eat Snakes? Vet-Verified Risks & Precautions

Cats are opportunistic hunters and sometimes hunt snakes as a result. Cats often hunt snakes for sport and leave the body after the game. Occasionally, cats will eat snakes, but it doesn’t happen frequently enough that you should rely on...

cat staring at snake

9 Best Cat Meal Toppers in 2025 – Reviews & Top Picks

Disclaimer: Before changing your cat’s food or offering new ingredients, consult with your veterinarian. Pets that are on a prescription diet or suffer from certain ailments may need to avoid certain food ingredients.Caring for a cat certainly has its ups...

Grey domestic cat being given food in a bowl

Are Laser Pointers Bad for Cats? Vet-Approved Safety Information & Tips

Laser pointers are popular toys, and it can be fun watching your cat chase after that little red dot. But if you’re wondering whether laser pointers are safe for cats, the short answer is that laser pointers are controversial because...

Two cats are lying on the floor. Gray cats are playing with a laser pointer.

Can I Use Human Eye Drops on Cats? Vet-Verified Facts and Precautions

While cats can develop eye problems just like humans do, their eye conditions should never be treated the same way that we would treat our own. This is especially true when it comes to treatments like human eye drops, as...

Woman with eye drops holding a cat

Will a Cat Purr When They’re Dying? Vet-Reviewed Facts & FAQ

Unfortunately, losing our pets is one of the many things in life that owners will have to face. Aside from saying goodbye to our feline companions, is it essential to know what their behaviors are like before they go? Maybe...

Sick cat in animal hospital