Updated September 25, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Quick answer: Gastric torsion, where the stomach fills with gas and twists, is a well-known emergency in large dogs but is rare in cats, with only occasional reported cases, sometimes linked to hernias or other abnormalities. A cat with a suddenly swollen, painful belly, repeated retching, or collapse needs emergency care regardless of the cause, since more common problems like intestinal blockages, fluid buildup, or bleeding can look similar.
Emergency signs
- Suddenly swollen or tight belly
- Retching or vomiting repeatedly
- Drooling
- Restlessness, hiding, or crying
- Fast breathing, weakness, or collapse
More common causes of a swollen belly in cats
- Intestinal blockages, including swallowed string
- Fluid in the belly from heart failure, liver disease, or FIP
- Bleeding from tumors or trauma
- Severe constipation
- A full bladder from urinary blockage (male cats)
What to do
Go to an emergency vet. Don’t give food, water, or medication. If you saw string in the mouth or rear end, don’t pull it.
Treatment
Stabilization with fluids and pain relief, imaging, and surgery when needed.
More: intestinal obstruction in cats.
Sources
- Merck Veterinary Manual: Gastric dilation and volvulus in small animals
- Merck Veterinary Manual: Intestinal obstruction in small animals
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.