Linear Foreign Body in Cats: String Ingestion Is an Emergency

By Tailwisp Editorial TeamUpdated October 20, 20265 min read

Cats love string. They bat it, chase it and chew it. That is exactly why linear foreign bodies are one of the most common causes of intestinal emergencies in cats. A single piece of thread can be fatal, and the damage can build quickly. Knowing the signs and what to do can save your cat's life.

What is a linear foreign body?

A foreign body is anything swallowed that should not be there. A linear foreign body is long and thin, such as thread, dental floss, yarn, ribbon, tinsel, rubber bands or fishing line. One end often catches around the base of the tongue, or lodges in the stomach. The rest passes down the intestine. Normal gut movement keeps pushing the string along, but because it is anchored, the intestine gathers in pleats along the string, like a drawstring being pulled. Over time, the string can saw through the wall of the intestine, causing perforation, spread of bacteria into the abdomen and a life-threatening infection called peritonitis.

Why cats swallow string

Cats explore with their mouths, and string moves in a way that triggers the hunting drive. Kittens and young cats are the most likely to swallow it, though adults do too. Tinsel and ribbon attract cats because of the shine and movement, and the rough surface of the cat's tongue works like a ratchet, so the cat cannot easily spit the string out once it starts to go down. See holiday hazards for cats and cats and Christmas trees.

Signs to watch for

Signs may appear within a day or two, though some cats show signs only after several days.

• Repeated vomiting, sometimes bile or foamy fluid.
• Refusing food, or interest in food that stops after a few bites.
• Lethargy and hiding.
• Abdominal pain, shown by a hunched posture, crying when touched or reluctance to be picked up.
• Drooling, or pawing at the mouth.
• Diarrhea or straining without result.
• A thread visible under the tongue, or hanging from the mouth or rectum.
• Fever, dehydration and collapse in advanced cases.

Many of these signs overlap with other illnesses. See cat vomiting causes and cat emergency warning signs. If there is any chance that your cat swallowed string, treat it as urgent.

What to do at home

Do not pull on any string hanging out of your cat's mouth or rear end. If it is attached inside, pulling can cut through the intestine. Do not cut it close to the body either, because the end may be drawn inside. Keep your cat calm, withhold food, and go to the vet or an emergency clinic. Take the object it chewed, if you know what it was, and tell the vet how long ago it might have swallowed it.

How vets diagnose it

The vet will examine your cat's mouth, including under the tongue, where a thread often hides. They will feel the abdomen for bunched intestines, and may take X-rays, which can show characteristic pleating and gas patterns. An ultrasound is often more helpful, because a string is not always visible on X-rays. Bloodwork checks hydration, organ function and signs of infection.

Treatment

If the string is anchored under the tongue, the vet may be able to release it under sedation and let it pass. If it is further in, treatment depends on how early the cat is seen. In some cases, endoscopy can retrieve a string from the stomach. When the intestines are damaged or there is no other option, surgery is necessary to remove the string and, if needed, repair or remove the damaged section of the intestine. Cats usually receive intravenous fluids, pain relief and antibiotics. Recovery depends on how much damage was done, and most cats treated early recover well.

Cost and insurance

Surgery for a linear foreign body can be expensive, particularly if an emergency clinic is involved. Pet insurance, if in place before the problem started, may cover it. See cat pet insurance guide and cat vet visit costs.

Prevention

• Store sewing supplies, dental floss, yarn and ribbon in closed containers.
• Put away wand toys with string after play. See how to play with your cat.
• Choose toys without strings, ribbons or small parts. See best cat toys by personality.
• Skip tinsel and use cat-safe decorations.
• Keep hair ties and rubber bands out of reach.
• Throw away used dental floss in a closed bin.
• Check toys regularly for loose threads.
• Watch cats that chew fabric. See why do cats lick plastic and wool.

Other foreign bodies

Cats can also swallow hair ties, toy parts, bones and other objects. These can cause blockages too. See can cats eat bones and cat-proofing your home.

Recovery after surgery or endoscopy

After treatment, most cats stay in the hospital for a few days on fluids and pain medication. Once home, they typically need a bland or prescription diet in small meals, restricted activity for about ten to fourteen days and a cone if they lick the incision. Your vet will check for vomiting, appetite and signs of infection. Complications can include leakage from the intestinal repair, so call quickly if your cat becomes lethargic, stops eating or vomits again. Keep follow-up appointments, and remove any string or similar objects from your cat's reach for good.

Why some cats keep doing it

A few cats seem drawn to chewing fabric, thread or plastic, a habit called pica. It may be linked with stress, boredom, early weaning or a medical problem. If your cat has already swallowed string once, talk to your vet about pica, and provide enrichment and safe chew alternatives such as cat grass. See how to grow cat grass.

When to see a vet

See a vet immediately if you suspect your cat swallowed string, or if it vomits repeatedly. Use the US vet directory to find a clinic.

This article is general educational information, not veterinary advice. Every cat is different. If your cat is unwell, or you are unsure about a symptom, diet change or medication, contact your veterinarian.