Why Is My Cat Vomiting? Causes & Treatment (Vet Guide 2026)

Cat owners should be worried if their cat vomiting since it could mean that the cat has a number of health problems. It’s vital to look for other signs and how the vomit looks. The color, how often it happens, and other symptoms can help you figure out whether you need to see a vet.

Why is your cat vomiting?

When you visit your vet and consult about your cat vomiting he/she may ask you some detail information such as –

• Have you recently changed your cat’s food or introduced a new brand?
• Has your cat started any new prescribed or over-the-counter medications?
• What exactly does your cat eat each day, including treats and table scraps?
• Do you have other cats at home, and are they showing similar symptoms?
• Is your cat strictly indoors, outdoors, or both?
• How frequently is the vomiting occurring, and what does the vomit look like (food, foam, hair, bile, blood)?
• Is your cat still eating and drinking normally?
• Are there any additional symptoms such as diarrhea or weight loss?
• How long has the vomiting been going on?

Answering all those questions will help your veterinarian to diagnose the actual cause of your cat vomiting. If you give your vet the right answers, they can figure out if the vomiting is due to a stomach problem or another disease.

Types of vomiting

Vomiting can be divided into two types. One is acute vomiting which occurs due to eating something unusual, if cat has intestinal parasites, pancreatitis or any bacterial or viral disease like feline panleukopenia. Once the underlying cause is addressed and appropriate treatment is provided, acute vomiting often resolves quickly.

Another one is chronic vomiting which is due to some diseased conditions. Some diseases like inflammatory bowel disease, cancer, kidney problems, etc. can cause cat vomiting for weeks to months. To manage chronic vomiting effectively, the underlying disease must be properly diagnosed and treated.

Common causes of cat vomiting

Here is the list of common causes of vomiting in cat for weeks to months –

🐾 Gastrointestinal Causes

• Dietary indiscretion (eating spoiled food, garbage, plants, or unusual items)
• Foreign body ingestion (such as string, plastic, hair ties, or bones)
• Inflammatory Bowel Disease (IBD)
• Pancreatitis
• Constipation
• Intestinal parasites
• Bacterial or viral infections

🩺 Systemic (Non-Gastrointestinal) Causes

• Hyperthyroidism
• Kidney disease
• Liver disease
• Diabetes mellitus
• Cancer
• Urinary tract infection (UTI)
• Medications (side effects or reactions)
• Inner ear infections
• Heartworm disease

What Does Your Cat’s Vomit Look Like?

Important hints regarding the underlying cause may be revealed by the way your cat’s vomit looks. Veterinarians can narrow down possible diagnoses by looking at the color, consistency, and content. Below are the most common types of cat vomiting and what they might mean:

🟡 Yellow (Bile)

Cats may throw up yellow bile when they don’t have any food in their stomachs. When a cat has anorexia, which means they don’t eat enough or go long periods of time without eating, this happens a lot.

🔴 Blood

Blood in vomit can be caused by severe inflammation, stomach ulcers, or vomiting a lot, which can irritate the stomach and esophagus. Blood can be dark and partly digested or bright red.

⚪ White Foam

White, foamy vomit is often a sign of inflammation in the stomach or small intestine. It could be a sign of irritation in the stomach or intestines, like gastritis.

💧 Clear Liquid or Water

Clear vomit could be caused by stomach fluids. Sometimes, cats drink too much water and then throw up right away.

🪱 Worms

When you see worms in the vomit, usually roundworms, it means you have a parasitic infection. Veterinary care is necessary to safely get rid of the parasites.

🍽 Undigested Food

If a cat eats too fast or too much, it may throw up soon after eating. The vomit often looks like a tube and has food in it that you can see.

🧶 Hairballs

Hairballs are common, especially in cats with long hair or cats that groom themselves too much. It’s normal to have hairballs every now and then, but having them all the time could mean something is wrong.

⚫ Black Liquid

If your cat vomit black or coffee-ground-like stuff, it could mean that blood has been digested from deeper in the digestive tract. Ulcers, foreign objects, or inflammation of the intestines could be to blame, and the vet needs to see it right away.

🟢 Green Vomit

Green vomit could indicate material coming up from the small intestine or bile mixed with stomach contents.

🧫 Mucus

Cats that regurgitate are more likely to produce mucus than cats that vomit. It’s important to figure out if your cat is vomiting (actively pushing something out of its stomach) or regurgitating (passively pushing something out of its stomach), because the causes are different.

Signs of Cat Vomiting to Look Out For

Vomiting is often linked to other clinical signs. Letting your vet know about all of your symptoms will help them make the right diagnosis and treatment.

Look out for:

• Throwing up and not wanting to eat
• Throwing up and not being able to go to the bathroom
• Diarrhea and throwing up
• Vomiting with sneezing or other signs of breathing problems
• Throwing up and being very thirsty
• Vomiting and not getting rid of waste properly (urinating or defecating outside the litter box)

If your cat throws up a lot, all the time, or with other symptoms like lethargy, weight loss, dehydration, or blood, take it to the vet right away.

When to be concerned about a cat vomiting

If you see any of the following, call your vet right away:

• Your cat vomiting more than two or three times in a row.
• Your cat has other problems, like not eating and having diarrhea. It will be hard to keep your cat hydrated if they also have diarrhea and you don’t take them to the vet.
• Your cat hasn’t eaten or drunk anything in 12 hours and has thrown up several times in a row.
• Your cat has already been diagnosed with an illness, like diabetes, kidney disease, or hyperthyroidism. This is an emergency, and you should take your cat to the vet right away because this could mean that their disease is getting worse. These patients need medical help right away because they can get dehydrated very quickly.
• A worm came out of your cat’s mouth. You need to get rid of the worms in your cat and any other pets in the house as soon as possible. Also, make sure to clean up after your pets and scoop the litter boxes a few times a day to keep them from getting sick again.

Cat Vomiting Treatment

How to treat a cat vomiting depends on what is causing it.

Cats with mild vomiting can often be treated at home with fluids, supportive care, and a bland diet. Cats with upset stomachs can eat bland foods that are easy to digest. They are usually commercial diets made to help with digestive health.

A bland diet might help cats with sensitive stomachs.

Final words for cat vomiting

It’s normal for cats to throw up every now and then, but you should never ignore frequent or severe cat vomiting. You can learn a lot about your cat’s health by looking at the color, frequency, and contents of their vomit, as well as any other symptoms they may have. It is very important to see a vet right away, especially if the vomiting is chronic, has blood in it, or is accompanied by lethargy, dehydration, or other worrying signs. You can help keep your cat healthy and comfortable by paying attention and acting quickly.