Understanding Why Your Cat Might Vomit

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Last updated 8/2/2025

cat health
vomiting
pet care
veterinary advice
feline care

Why Do Cats Vomit?

Cats can vomit for many reasons, ranging from harmless to serious health issues. A single episode of vomiting usually isn't a concern. If your cat vomits once or twice occasionally but seems fine otherwise, it might not be something to worry about.

When to Seek Help

If vomiting becomes chronic or severe, it's best to get veterinary advice. Watch for other symptoms like lethargy, diarrhea, or loss of appetite. Your vet may ask questions and run tests to find the cause.

Common Causes of Vomiting

1. Hairballs

Hairballs are common in cats, especially those with long hair. Vomiting can expel stomach contents along with hair. But hairballs aren't always the cause, so don't assume they are without checking other factors. Read more on Hairballs in Cats

2. Eating Problems

  • Eating too quickly or overeating
  • Change in diet
  • Food intolerance
  • Consuming grass or plants
  • Eating spoiled food
  • Consuming rodents, birds, or foreign objects

3. Worms

Worm infestations and other parasites can cause vomiting. If you see worms in the vomit, de-worming medicine is needed immediately. Learn more about Worming Your Cat Sometimes, cats vomit after taking de-worming medicine too.

4. Poisons

Various toxic substances can cause cats to vomit. These include:
  • Toxic plants
  • Anti-freeze
  • Lead paints
  • Cleaning agents
  • Human medications
  • Coffee
  • Weed killer and fertilizers
Accidental overdoses of medications can also result in vomiting.

5. Gastric and Intestinal Problems

Some conditions that might cause vomiting include:
  • Colitis
  • Cancer
  • Constipation
  • Enteritis
  • Fungal disease
  • Gastritis
  • Irritable Bowel Syndrome
  • Obstruction
  • Tumours
  • Ulcers

6. Metabolic Diseases

  • Acidosis
  • Diabetes
  • Feline Hyperthyroidism
  • Hormone imbalance
  • Kidney disease
  • Liver disease
  • Pancreatitis
  • Sepsis

7. Infections

Infections like Salmonella, pyometra (uterine infection), and abscesses can cause vomiting.

8. Other Causes

Conditions such as Feline Urinary Syndrome, heat stroke, and motion sickness could also lead to vomiting.

Final Note

Vomiting has many causes and this information is not meant to replace vet advice. Always consult your vet for persistent or serious issues.