Vomiting in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026
Table of contents

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

?

ORANGE with repeated vomiting, inappetence >24 h, dehydration, or abdominal pain. RED with blood, collapse, severe lethargy, or suspected foreign body.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition

Vomiting in cats is the active expulsion of stomach contents through the mouth. It is a common symptom that can indicate various underlying health problems.

Can Occur with the Following Diseases:

Basics and possible causes

Vomiting is a protective mechanism of the body aimed at removing harmful or irritating substances from the stomach. It is controlled by the vomiting center in the brain, which responds to various stimuli. In cats, vomiting can be triggered by a wide range of causes, from harmless to serious health problems.

A common cause of Vomiting in cats is eating grass or other indigestible materials. Cats sometimes eat grass to induce Vomiting and expel hairballs or other indigestible substances. This is usually not a cause for concern as long as it does not happen frequently.

Vomiting can also be caused by sudden diet changes or eating spoiled food. Cats are sensitive to changes in their diet, and an abrupt switch can strain the digestive system. Likewise, moldy or poorly stored food can contain toxic substances that trigger Vomiting.

Another possible cause is infections, such as viral or bacterial infections of the gastrointestinal tract. These can lead to Inflammatory conditions and irritation that promote Vomiting. Parasitic infestation, such as roundworms, can also cause Vomiting because the parasites irritate the gastrointestinal tract.

Diseases of the internal organs, such as liver or kidney disease, can also lead to Vomiting. These conditions affect the body’s metabolism and detoxification processes, leading to a buildup of toxins that can cause Nausea and Vomiting.

Finally, stress and Anxiety in cats can also trigger Vomiting. Stress factors such as moving house, new pets, or changes in the home environment can affect a cat’s well-being and lead to digestive problems.

Typical accompanying symptoms

  • Loss of appetite: Cats that suffer from Vomiting often also show a reduced appetite or refuse to eat altogether. This may indicate Nausea or an underlying problem.

  • Weight loss: Persistent vomiting can lead to weight loss, as the cat does not absorb enough nutrients or is unable to digest them.

  • Lethargy: Affected cats often seem tired and listless. They show less interest in their surroundings and withdraw.

  • Dehydration: Vomiting can lead to Fluid loss (dehydration), which is noticeable through dry mucous membranes, sunken eyes, and reduced skin elasticity.

  • Abdominal pain: Cats with Abdominal pain may lick themselves frequently, meow more, or adopt a hunched posture.

  • Diarrhea: In some cases, Vomiting occurs together with Diarrhea, which may indicate a gastrointestinal disorder.

  • Increased salivation: Nausea often leads to increased salivation as the cat tries to relieve the unpleasant taste in its mouth.

When to see a vet?

A visit to the veterinarian is essential if your cat’s Vomiting lasts longer than 24 hours or if it is accompanied by other severe symptoms, such as bloody vomit, severe Diarrhea, lethargy, or Fever. These signs could indicate a serious illness that requires immediate attention.

Even if your cat is vomiting persistently or the Vomiting is recurrent, even if it does not seem severe, you should consult a veterinarian. Chronic vomiting can indicate an underlying disease that requires specific treatment.

If you notice that your cat has vomited unusual substances, such as foreign objects, plant material, or parasites, you should also have this checked as soon as possible. Such cases may indicate poisoning or other serious health problems.

Symptom recognition for the pet owner and veterinary diagnostic procedure

As a pet owner, it is important to pay attention to the frequency, timing, and contents of the Vomiting. Make a note of whether the Vomiting occurs after eating, whether undigested food or bile is vomited, and whether the Vomiting is accompanied by other symptoms. This information is helpful for the veterinarian to make a diagnosis.

The veterinarian will take a thorough medical history and perform a physical examination of your cat. They will look for signs of Fluid loss (dehydration), Abdominal pain, or other physical abnormalities. Depending on the suspected cause, blood tests, X-rays, or ultrasound examinations may be necessary to determine the cause of the Vomiting more precisely.

In some cases, a fecal test may also be necessary to check for parasites or other abnormalities. If a food allergy is suspected, the veterinarian may recommend a special elimination diet to identify possible triggers.

What the pet owner can do and professional therapy options

If your cat is vomiting, first try to calm them and provide a quiet environment. Temporarily remove food to rest the stomach, and only offer small amounts of water after a few hours to ensure fluid intake.

Monitor closely to see whether your cat’s condition improves. If the Vomiting does not resolve on its own or the symptoms worsen, seek veterinary help immediately. Avoid giving your cat medication on your own unless the veterinarian has explicitly recommended it.

To prevent future Vomiting, avoid sudden food changes and offer your cat high-quality food. Make sure your pet does not have access to potentially harmful substances, such as household chemicals or poisonous plants.

Outlook on current research

In recent years, veterinary research has made significant progress in understanding the mechanisms that trigger Vomiting in cats. Scientists are increasingly focusing on the role of the gastrointestinal tract and the neurological signaling pathways that control Vomiting. It has been found that the central nervous system, especially the vomiting center in the brain, plays a key role. The latest studies are examining the interaction between the enteric nervous system and the central nervous system to understand how stimuli in the gastrointestinal tract lead to a vomiting response.

Another exciting area of research is the role of inflammatory mediators and their influence on Vomiting. Researchers are trying to characterize inflammatory processes in the stomach and intestines more precisely to understand how they can activate the vomiting center. Some studies suggest that certain cytokines and inflammatory mediators could act as triggers for Chronic vomiting. These findings could lead to new treatment approaches in the future that specifically target inflammatory processes.

The genetic component of Vomiting is also being investigated. There is evidence that certain breeds may be more prone to Vomiting, suggesting genetic predispositions. Genome studies could provide insight into which genetic markers are associated with an increased susceptibility to Vomiting in cats. In the long term, this could lead to improved prevention strategies that target genetic risks.

Another promising research direction is the development of new diagnostic tools that enable veterinarians to identify the cause of Vomiting more quickly and accurately. Advances in diagnostic imaging, such as the use of advanced ultrasound and endoscopy techniques, are improving the ability to detect structural abnormalities in the gastrointestinal tract. In addition, new blood markers are being researched that could identify specific causes of Vomiting, leading to more targeted therapy.

Finally, the role of nutrition in the prevention and treatment of Vomiting is also being studied. Studies show that the composition of food can have a significant impact on gastrointestinal health and therefore on the tendency to vomit. Researchers are developing special diets aimed at soothing the gastrointestinal tract and reducing the risk of Vomiting. These diets could play an important role in the prevention and treatment of Vomiting in cats in the future.

Frequently asked questions

1. Why do cats vomit frequently?
Cats often vomit for various reasons, ranging from harmless causes such as hairballs to more serious problems such as gastrointestinal diseases. Stress, dietary changes, or eating plants can also be triggers.
2. Is occasional vomiting normal in cats?
Yes, occasional Vomiting can be normal in cats, especially when it involves hairballs. However, frequent or Chronic vomiting should be examined by a veterinarian to rule out serious health problems.
3. How can I tell if my cat's vomiting is serious?
Watch for additional symptoms such as lethargy, Weight loss, Diarrhea, or blood in the vomit. These may indicate a more serious problem that requires a veterinary examination.
4. What should I do if my cat vomits?
Monitor your cat closely and note the frequency and pattern of the Vomiting. If the Vomiting persists or is accompanied by other symptoms, see a veterinarian. Withhold food temporarily to calm the stomach, and offer small amounts later.
5. Can home remedies help with vomiting?
Some home remedies, such as offering a bland diet (e.g., cooked chicken and rice), can help. However, it is important to consult a veterinarian beforehand to ensure there are no serious health problems.
6. When should I see a veterinarian?
See a veterinarian if your cat’s Vomiting lasts longer than one or two days, occurs frequently, or is accompanied by other symptoms. If your cat shows signs of Fluid loss (dehydration), an immediate veterinary visit is also recommended.
7. Can food intolerances cause vomiting?
Yes, food intolerances can trigger Vomiting. Switching to a hypoallergenic or special diet food can help identify and treat the problem.
8. What role do hairballs play in vomiting?
Hairballs are a common cause of Vomiting in cats, especially in long-haired breeds. Regular brushing and special supplements can help reduce hairball formation.
9. Can stress trigger Vomiting in cats?
Yes, stress can play a significant role in Vomiting. Changes in the environment, new pets, or loud noises can cause stress, which may show up as Vomiting.
10. Are there preventive measures against vomiting?
A balanced diet, regular veterinary check-ups, and minimizing stress factors can help prevent Vomiting. Avoiding access to poisonous plants and dangerous substances is also important.