A healthy cat spends a large part of its waking day grooming itself, and does it well enough that most cats never need any help. So a cat that suddenly has a matted back is telling you something changed.
Why a Cat Stops Grooming Itself
15 July 2026 · Cats
Read Where the Mats Are
This is the most useful thing on this page. A cat grooms what it can reach. When something makes reaching hard, the coat fails in a very specific pattern:
- Along the spine and the lower back
- Behind the shoulder blades
- The base of the tail
- The back of the thighs and the britches
Meanwhile the face, the chest and the front legs stay immaculate, because the cat can still reach those with its tongue and its front paws.
That contrast is the tell. A cat with a perfect front end and a felted back is not neglecting itself. It is unable to twist.
Weight
The most common cause. A cat that has gained enough weight cannot physically fold itself far enough to reach its own back and hindquarters, and the coat there goes first.
It happens gradually, which is why owners rarely connect the two. The cat has looked much the same for two years and the mats seem to have appeared out of nowhere.
Arthritis
Joint disease in cats is common, badly under-diagnosed, and almost invisible. Cats do not usually limp with it. They stop jumping onto the counter, they take the stairs differently, they sleep somewhere lower down, and they stop twisting to groom because twisting hurts.
An older cat with a matted back and a new preference for the floor is worth a vet visit on that evidence alone.
Dental Pain
Grooming is done with the mouth. A cat with a painful tooth, inflamed gums or a resorptive lesion will groom less because the act itself hurts, and the coat gets dull and greasy as well as matted.
Bad breath, dropping food, chewing on one side or pawing at the mouth alongside a declining coat points here.
Age, and the Coat Itself
Older cats groom less thoroughly even without a specific problem, and the coat changes underneath them: often drier, sometimes greasier, and more inclined to hold a tangle than the same cat's coat at four.
Long haired breeds have the least margin. A Persian mats to the skin within days of being left, and a Maine Coon is not far behind. The silky coat guide covers which cats have no undercoat and therefore less trouble than their length suggests.
What the Mats Do Once They Start
They do not stay still. A mat tightens as the coat keeps growing under it, and it pulls on skin every time the cat moves. Cat skin is thin and mobile, so a tight mat lifts it into a ridge.
That is painful, it makes the cat groom the area even less, and the whole thing accelerates. A pelted cat, where the mats have joined into a single sheet across the back, is a welfare problem rather than a cosmetic one and needs a professional.
Do not cut a mat off a cat with scissors. Skin tents up into the mat and the base of what looks like hair is frequently skin. It is the single most common way owners injure their own cat.
What to Do First
The vet, not the groomer. The coat is a symptom here, and clipping the mats off without finding out why they appeared means the same thing happens again in three months.
Then deal with the coat. A cat that has stopped reaching its own back needs somebody else combing it a few times a week from now on, and that is a permanent change rather than a one-off.
Grooming a cat that is already sore is a specialist job and not every salon takes cats at all. The directory lists salons by town, and it is worth phoning ahead to ask.
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