A swallowed string, thread, ribbon or hair tie is far more dangerous than a solid object. One end anchors, usually under the tongue or at the stomach exit, while the gut keeps trying to move the rest along. The intestine bunches up and the string can saw through its wall. Never pull on a string you can see.
Why this one is different
Most swallowed objects cause a blockage. A ball, a stone, a piece of toy: it lodges, food stops moving, and that is a serious but fairly straightforward problem.
A long thin object behaves entirely differently, and the difference is what makes it so dangerous. If one end catches on something, most often around the base of the tongue in cats or at the exit from the stomach, it cannot move on. The intestine, meanwhile, does what it always does and keeps contracting to push the material along.
The result is that the gut gathers itself up along the string like fabric bunching on a thread. That is called plication, and it is exactly what it sounds like. The string is then pulled taut against the inside curve of every gathered loop, and with each contraction it works against the tissue. Given time, it saws through, and intestinal contents leak into the abdomen.
That is peritonitis, and it is where this goes from an operation to a fight. It is the whole reason we treat string differently from a swallowed sock.
The one thing not to do
If you can see thread hanging from your cat’s mouth, or string protruding from under the tail, do not pull it. This is the single most important sentence in this article.
The far end may already be anchored deep in the intestine. Pulling from outside puts direct tension on tissue that is already being cut, and it can tear the bowel. It can also drag a needle or a barbed length of material backwards through tissue it has not yet damaged.
Leave it exactly where it is. If a length is trailing and your cat is treading on it or catching it on furniture, you may cut it off close to the mouth or the anus so it cannot be pulled by accident, then come straight in. Do not pull, do not wind it around anything, and do not let a child or another pet play with it.
Equally, do not try to make your cat bring it up. Retching against an anchored string does the same damage as pulling on it, and the decision about how to remove it belongs with the veterinary team looking at the imaging.
What gets swallowed
- Sewing thread, embroidery floss and wool, particularly with a needle still attached
- Dental floss, which cats find in bathroom bins
- Hair elastics and scrunchies, a genuine favourite
- Ribbon, gift string and curling ribbon
- Tinsel, at the other end of the year
- Shoelaces, drawstrings from hoodies and cords from blinds
- Fabric strips torn from soft toys, and the stringy core of some cat toys
- Corn silk, elastic bands and cable ties
Late August brings a specific version of this into the house. School and craft supplies arrive, sewing gets done, backpacks with drawstrings are left on the floor, and hair ties multiply on every surface in a household with school-age children. A bathroom bin with used floss in it is a reliable source year round.
Cats are over-represented because of how their tongues work. Backward-facing barbs mean that once something stringy is on the tongue, spitting it out is genuinely difficult, so swallowing becomes the path of least resistance. Dogs swallow linear objects too, usually fabric, socks and rope toy strands.
What you will see
Signs usually appear within a day or two, though they can come on faster:
- Repeated vomiting, often persisting when the stomach is empty
- Refusing food, sometimes while still showing interest in water
- Lethargy, hiding, or sitting hunched in an unusual posture
- A tense, painful abdomen, or objecting when picked up around the middle
- Straining with little or no stool, or diarrhoea
- Drooling, gagging, or repeated attempts to swallow
- Pawing at the mouth, or a sudden aversion to being touched around the face
- Fever, collapse or a grey, unwell appearance in later stages
Look under the tongue if your cat will safely allow it, since string caught around the base of the tongue is a classic finding and is easy to miss on a quick glance. Do not force a distressed cat’s mouth open to check, and if you do find something, leave it alone and come in.
The awkward truth is that many owners never see the swallowing happen. A cat who is vomiting repeatedly, off food and hiding needs assessment regardless of whether anything was witnessed, and string is one of the possibilities that gets specifically looked for.
What happens when you arrive
Assessment starts with a physical examination, including a careful look under the tongue, and imaging. Radiographs of a linear foreign body have a recognisable appearance, because bunched intestine and abnormal gas patterns look different from a simple obstruction, and ultrasound adds detail. Bloodwork assesses hydration, electrolytes and how unwell the patient is systemically. This runs through our emergency diagnostics.
Treatment is usually surgical, and the timing genuinely matters. An early case may need a single small opening to retrieve the material. A delayed one can require multiple incisions along a damaged intestine, or removal of a section that has already been cut through. Our emergency surgical services team handles this, with stabilisation, fluids and pain management alongside through our medical services.
Occasionally, where a string is only caught under the tongue and has not travelled far, releasing it resolves the problem without abdominal surgery. That is a decision made on imaging, not on hope, and it is another reason to come in early rather than wait for the picture to declare itself.
This is what an after-hours clinic is for
It is worth saying plainly, because owners hesitate at ten at night in a way they would not at ten in the morning. We are the emergency clinic. If your cat has swallowed string, or is vomiting repeatedly and refusing food overnight, this is precisely the situation we are open for, and the outcome is materially better when these cases are seen early rather than at nine the next morning.
Phone ahead so the team is ready. Bring the packaging or a sample of the material if you have it, and say how much is missing. If a needle was attached, say so immediately, since that changes the urgency and the imaging.
Our guide to recognising a true emergency covers the wider thresholds, and our post on emergency preparedness is worth reading before you need it rather than during.
Prevention, which is mostly tidying
Treat string like medication. Sewing kits in closed containers, floss in a lidded bin, hair ties in a drawer rather than on the bathroom counter, ribbon put away straight after use, blind cords tied up out of reach.
Do not let a cat play with string, wool or ribbon unsupervised, however charming it looks, and check cat toys for stringy cores and loose fabric. Cut up elastic bands and rings before binning them. If your cat is a determined fabric chewer, that pattern is worth raising with your regular veterinary team, because repeat episodes are common.
Frequently asked questions
My cat has string hanging out of its mouth. Should I pull it?
No. The other end may be anchored deep in the intestine, and pulling can tear the bowel or drag a needle backwards through tissue. Leave it exactly as it is. If a long length is trailing and might be caught accidentally, you can cut it close to the mouth so it cannot be pulled, then come in straight away.
Why is string worse than swallowing a solid object?
Because it does not simply block. When one end anchors, the intestine keeps contracting and gathers itself along the string like fabric on a thread, and the taut string then saws against the bowel wall with every contraction. If it cuts through, intestinal contents leak into the abdomen. A solid object obstructs, which is serious, but this actively damages tissue.
How long before symptoms show?
Usually within a day or two, sometimes faster. Repeated vomiting, refusing food, lethargy, hiding and abdominal pain are the common signs. Do not use the absence of symptoms as reassurance in the first few hours, and do not wait for them to appear if you know or suspect something stringy was swallowed.
Can it pass on its own?
Sometimes a short length passes uneventfully, but you cannot know in advance whether a given piece will, and by the time it becomes clear that it has not, damage may already be done. Imaging is what tells the team where the material is and whether the intestine is already bunched. That is a decision to make with pictures rather than by waiting.
What if I did not see my cat swallow anything?
Come in anyway if your cat is vomiting repeatedly, refusing food, hiding or seems painful. Most owners never witness it. Linear foreign bodies are specifically looked for in cats presenting this way, including a careful examination under the tongue, so an unwitnessed episode is still very much findable.
Is this only a problem for cats?
Cats are over-represented, partly because the backward-facing barbs on their tongues make spitting out stringy material difficult, so swallowing becomes easier than rejecting it. Dogs do swallow linear objects too, more often fabric, socks and rope toy strands, and the mechanism and the danger are the same.