Cats are naturally attracted to string-like objects: yarn, dental floss, ribbon, tinsel, rubber bands, hair ties, thread with needles, and fishing line. When swallowed, these linear foreign bodies anchor at the base of the tongue or in the stomach while the trailing end moves into the intestines. Peristalsis bunches the intestine around the string like an accordion, and the taut material can slice through the intestinal wall, causing perforation, septic peritonitis, and death.

Why linear foreign bodies are especially dangerous

Unlike a solid object that might pass or create a single point of obstruction, a linear foreign body causes damage along its entire length. Multiple sections of intestine can be compromised simultaneously. The longer the material remains, the more cuts accumulate. Surgery may require removing damaged sections of bowel (resection and anastomosis), increasing both complexity and recovery time.

Symptoms

Vomiting is the most common early sign, often persistent and worsening. Cats may stop eating, become lethargic, and show abdominal pain when handled. Diarrhea or straining with no stool production can occur. In some cases, string is visible under the tongue or protruding from the anus. A hunched posture and reluctance to move suggest significant discomfort.

Critical rule: never pull

If you see string hanging from your cat’s mouth or rectum, do not pull it. The other end may be anchored or wrapped around internal tissue. Pulling can cause immediate perforation of the intestinal wall. Trim visible excess with scissors to prevent more from being swallowed and head to the veterinarian.

Veterinary treatment

Diagnosis involves physical examination (checking under the tongue), radiographs, and often ultrasound, which can reveal the characteristic intestinal plication pattern. Treatment is almost always surgical. Post-operative care includes antibiotics, IV fluids, pain management, and gradual reintroduction of food. Prognosis is best when surgery occurs before perforation.

Prevention

Store yarn, thread, ribbon, tinsel, dental floss, and rubber bands in sealed containers. Supervise play with string-type toys and put them away when finished. Replace damaged toys before pieces come loose. Choose cat toys designed to be chewed safely rather than those with trailing strings.

Veterinary disclaimer: This article is for general education only and does not replace an examination by a licensed veterinarian. If you suspect your cat has swallowed string or thread, contact your vet immediately.