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

10 Best Cat Litters for Allergies in 2026 – Reviews & Top Picks

Just like humans, our cats can suffer from allergies, and it’s no fun for them at all! If you notice your cat sneezing,...

Can Cats Drink Wine? Vet-Verified Safety Information

Many cat lovers appreciate a nice glass of wine in the evening to help them relax. Not only is it a crisp and...

Who Is Schrodinger’s Cat? We Explain It for Cat People

For most of us, say the words “quantum theory” or “physics” and our eyes immediately glaze over or our brains just tune out....

Is Eucalyptus Poisonous to Cats? Vet-Verified Facts, Risks & Safety Tips

Eucalyptus is poisonous to cats in high amounts. When it is concentrated into an oil, it is especially toxic. You should not defuse...

More related

How Long to Quarantine a Cat With Ringworm? Vet Reviewed Facts You Need to Know

If you’re petting your cat and notice a strange, circular sore on its skin, you probably wonder what it could be. This round...

Can Cats Drink Alkaline Water? Vet-Reviewed Nutritional Fatcs & FAQ

While alkaline water may have some health benefits, it should not be provided to felines. Alkaline water can harm a cat’s digestive system,...

Can Cats Eat Anchovies? Vet-Reviewed Facts & FAQ

Cats love meaty treats, and anchovies are no different. In fact, anchovies are a moderately healthy food that many cats love. They make...

3 Homemade Pumpkin Cat Treat Recipes To Enjoy This Fall

Cats are obligate carnivores, meaning they need a meat-based diet. That said, there’s nothing wrong with treating your furry friend to a few...

Keep reading

Should I Euthanize My Cat With Diabetes? Vet-Reviewed Facts & FAQ

Deciding whether or not to euthanize a beloved pet with diabetes is one of the most difficult decisions a pet owner can face. Diabetes is a serious condition that affects cats, and if left untreated, it can lead to significant...

cat with intravenous infusion drip in vet clinic

Is Ponytail Palm Toxic to Cats? Vet-Reviewed Houseplants Examined

With its plump, robust trunk that’s wider at the bottom and long, narrow leaves, the ponytail palm is an eye-catching plant that can reach heights up to 3 feet indoors. If you have a cat and wonder if the ponytail...

Catster_Is Ponytail Palm Toxic to Cats

Can You Put a Flea Collar on a Pregnant Cat? Vet-Reviewed Precautions & Risks

Cat flea collars use a form of insecticide to repel, deter, or kill fleas. They can be used in conjunction with spot-on treatments or independently, though owners do need to be aware of the potential risks associated with flea collars....

Collar for animals protecting against fleas

How to Stop Your Cat From Climbing the Curtains: 11 Vet-Reviewed Ways

Cats can get up to all kinds of mischief around our homes—not out of spite but because they’re trying to release pent-up energy, explore something new and interesting, or simply enjoy themselves. For example, the curtains might be your pride...

Do Cats Purr When They Are Stressed or Nervous? Vet-Reviewed Facts & FAQ

Almost nothing is more relaxing than having a cat curled up on your lap, purring gently. But have you ever wondered why cats purr? It seems like they purr when they’re happy, but do cats purr when they aren’t so...

cat sleeping on owner's lap

13 Vet-Verified Signs You Need to Take Your Cat to the Vet Right Away

Cats are experts at hiding illnesses, a trait they’ve inherited from their wild ancestors because an unwell wild cat would often become a quick and easy target for predators. Your cat may not have to worry about predators picking them...

vet giving medicine to a cat

Can Cats Eat Pepperoni? Vet-Reviewed Nutritional Facts & Safety Info

You might have left out a leftover pizza only to be interrupted by a phone call. When you come back, you find your cat chomping down on the pepperoni. Should you be worried? Can cats even eat pepperoni? We’ll look...

Can Cats Eat Pepperoni

Can Cats Eat Beggin’ Strips? Vet Reviewed Health Risks & FAQ

Beggin’ Strips are popular dog treats and have a strong, meaty odor, which may make your cat seek them out. However, Beggin’ Strips are not healthy for cats and neither are most dog treats. Dog treats, like Beggin’ Strips, are...

Can Cats Eat Beggin’ Strips

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.