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

Share

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.

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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting About Big Cat Tourism, Lion Hunting, and Learning From Our Mistakes | Chatty Cattys, Episode 26

In this episode of Catster’s Chatty Cattys podcast, Nicole and Dr. Karyn dive into the dark side of big cat tourism and the...

Why Cats Sit by the Door (But Don’t Go Through It)

Door-sitting is one of those quirky little habits that almost every cat owner experiences at some point. You know how it goes: a...

Six Legs Are Better Than Three – How A Tripod Dog and Kitten Found Friendship Through Recovery

Sometimes the most meaningful friendships begin in the most unexpected places. At a Maryland veterinary hospital operated by Last Chance Animal Rescue, two...

The Original Space Invaders – Why Zero Respect for Personal Boundaries Is a Good Thing

Cats have a reputation for being independent, and in many ways they are. But anyone who has tried to work at a laptop...

More related

National Pet Preparedness Month 2026: When & What Is It?

Throughout recorded history, countless pets and animals have been lost to the unfathomable forces that are natural disasters. From hurricanes savaging the South...

42 Vet-Verified Manx Cat Colors & Patterns (With Pictures & Infographics)

The Manx cat is instantly recognizable thanks to their tailless bottoms. However, even with this one significant similarity, they can be found in...

100+ Shy Cat Names: Ideas for Sweet & Timid Cats

Not all cats can be described as outgoing. Cats are often categorized as shy or even a bit skittish—hence the term “scaredy cat.”...

How Is My Cat Sleeping with Their Head Up? Vet-Reviewed Facts & FAQ

As cat parents, we already know that cats are strange creatures. They run through the house in the wee hours of the night,...

Keep reading

Colitis in Cats: Our Vet Explains Signs, Diagnosis & Treatment

Taking care of a cat experiencing gastrointestinal symptoms can be quite an ordeal and cause a significant amount of stress for both you and your cat. A gastrointestinal sign that may impact your cat and make them feel ill is...

A cat having a check up at a small animal vet clinic

5 Vet-Reviewed Reasons Why Your Cat Uses You As A Scratching Post & How To Stop It

Your cat’s claws are used for survival as hunting weapons and tree-scaling devices in the wild. As domesticated pets, their claws are kept in tip-top shape with regular scratching, which also serves as a way to do a full body...

Two cats in a cat tree with scratching post

Is It Safe To Dye Your Cat’s Fur? Vet Approved Advice

If you’ve been online and pictures of cats with dyed coats have crossed your path, you may be wondering how the process works, what it involves, and whether it may be something to consider doing with your companion. In theory...

woman preparing dye for hair coloring on pink background

Will a Cat Overeat If They Get Excess Food? Vet-Approved Facts & Feeding Tips

Cat owners who spend time away from their pets often worry about their pets going hungry. To ensure that their pet is never too far from a meal, they often leave food out for them to freely snack on during...

brown white cat eating from feeding table

Feeding Baby Food to Cats: What’s Safe and What’s Toxic

You’re feeding your baby some pureed chicken, and your cat materializes out of nowhere, sniffing the air with intense interest. On impulse, you offer a tiny spoonful. Your cat devours it immediately and looks at you like you’ve just unlocked...

baby food

Why Does My Cat Lay on My Stomach? 5 Vet-Verified Reasons

When you’re sitting still or lying down for long enough, it’s perfectly normal for your cat to come around and try to spend a little extra time with you. But why is your cat taking every chance they get to...

cat-sleeping-on-owners-lap

Are Flea Collars Safe for Cats? Vet-Verified Facts & Alternatives

Whether yours is an indoor cat or an outdoor cat, fleas are a constant and potential health hazard. An outdoor cat may be exposed to fleas every time they step outside. However, if you think your indoor cat is protected...

Catster_Are Flea Collars Safe for Cats

Why Is My Cat Drooling Thick Saliva? 12 Vet-Reviewed Reasons & Treatment

Cats are fascinating creatures, often leaving us in awe with their peculiar habits and quirky behaviors. However, as a cat owner, you might be alarmed to see thick saliva dripping from your feline’s mouth, making you wonder if it’s a...

Orange cat drooling

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.