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 to Stimulate Your Cat’s Milk Production: 6 Vet-Approved Solutions

Nursing is a beautiful time for a new mother, and as your cat’s owner, you’ll find that it’s a wonderful thing to witness...

Can Ragdoll Cats Go Outside? Vet-Verified Info & Roaming Tips

Ragdolls are notorious for going limp when picked up, hence the name. So, can a fuzzy, limp noodle do well outside? Truthfully, the...

Cat Coat Genetics: Vet-Approved Facts & FAQ

Have you ever wondered how your cat ended up with the coat color that they did? Maybe you know that your cat had...

The Strange Case of Dr Jekyll and Mr Raphael

Welcome to the Wednesday Cats of Catster! Every week, we share a story from one of our cat-loving Catsters. This week is about...

More related

Can You Put a Cat on a Leash? Is It Cruel? Vet Approved Facts, Pros & Cons

Our feline friends love to explore, and some inside kitties yearn to explore the great outdoors. However, it’s not always wise to open...

8 Best Cat Doors (2025) – Reviews & Top Picks

Cats are naturally adventurous, independent, and fairly solitary creatures that need a fair amount of freedom and space to stay happy. While most...

Sudden Weight Loss in Cats: 12 Possible Causes & What to Do (Vet Answer)

Cats are not always the most forthcoming when it comes to illness, and it’s up to us to be on the lookout for...

15 Types of Cat Furs: Colors, Patterns & Markings (With Pictures)

Felines have coats of fur that come in a variety of different colors, patterns, and markings. If you’re thinking about adding a new...

Keep reading

Will a Cat Fake a Limp for Sympathy? Vet-Verified Behavior Explanation

Cats are stereotypically perceived as being independent, yet they enjoy the attention of their human family members. Have you ever wondered whether a cat would fake a limp or illness just to get sympathy and attention? Would your cat actually...

sick cat with feline disease

Fancy Feast Cat Food Review in 2025: Recalls, Pros & Cons

Review Summary If you’ve been researching cat foods, you’ve probably seen the name Fancy Feast. This well-known brand has been around since 1982 and now offers a wide range of over 150 different types of cat food, including dry kibble,...

Fancy Feast Cat Food Review

Why Does My Cat Want Me to Watch Her Eat? Vet-Verified Facts & Info

Cats have many quirky habits that make them beloved pets around the world. You are probably already aware that cats can be finicky about feeding time, whether it’s over the type of food, if they prefer to be left alone...

woman petting her cat while eating

How Many Hours a Day Do Cats Groom? Vet-Reviewed Behavior Explained

Imagine spending half of your waking hours in the shower every single day. While that might seem exceedingly boring and tedious to us, cats spend approximately 2–5 hours grooming themselves every day, which is between 30% and 50% of their...

bengal cat grooming itself

How to Safely Surrender a Cat: 4 Responsible Steps & FAQ

Surrendering your cat can be a difficult and emotional experience. It’s important to consider all the potential implications of surrendering your pet before making this decision. This article outlines everything you need to know about how to safely and responsibly...

cat on woman owners lap

Kitten Suckling: Vet-Reviewed Behavior Facts & FAQ

If you’ve brought a new kitten into your home, you might have noticed your kitty sometimes engages in what can seem like odd behavior. Whether it’s crazy cat time or a penchant for trying to eat their tail, kittens (and...

A cat sucking on a blanket.

10 Best Dry Kitten Foods (2025) – Reviews & Top Picks

Growing kittens need the right mix of nutrients, minerals, and vitamins to thrive, and the dry food you choose to feed these developing felines is an important choice. This stage of growth and development will set the stage for the...

two kittens eating cat food_shutterstock_MaraZe

How Do Cats Carry Their Kittens? & Why It Doesn’t Hurt Them (Vet-Verified Info)

If your cat has recently had kittens, you’ve probably seen her moving the kittens around by the scruff of their necks. Many pet parents worry that this hurts the kitten and that the mother cat does it as a form...

Mother cat running with newborn kitten in her mouth