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Cats/Maybe ingrown fur?


A little while ago I noticed a small bump on my cats chest. It doesn't seem sensitive at all, she doesn't seem to react when it is touched. I'm not sure if cats can even get ingrown hairs, but it looks like that might be what it is. There is a small hole in the skin directly above the lump, and 'inside' it looks grey, as if it might be fur in there.
Does this sound like ingrown fur, or something else? If it is fur, how would this be treated at home?

Hi Sarah,

It sounds possible that what you've discovered is a sebaceous cyst. They derive their name from the fact that they are filed with an oily substance called sebum, which is typically white to gray in color. The cysts are common, with some cats more predisposed. While they don't always have a known cause, small injuries like scratches, splinters, and, yes, ingrown hairs, are some known causes. Fortunately, the growths are benign and usually need no treatment at all.

Most sebaceous cysts are slow-growing. Unless in a critical location, they don't interfere with normal function, and they don't cause pain. Some stay very small, and some continue to grow until they are about the size of a pea. At some point, they may burst like a pimple (and, in essence, they are very similar). If this occurs, you should gently squeeze out as much of the waxy substance as you can and rinse with a gentle soapy water (this isn't a dangerous job but can be dirty, so some prefer to bring the cat to the vet for cleanup). If the skin is open, apply a very thin layer of triple antibiotic ointment. The site may continue to drain for a short period, and it's likely that another cyst will arise later in the same spot.

Because of the propensity of these cysts to recur and even worsen in reaction to trauma, it's not recommended to try to remove or drain them surgically unless they become infected or are in a place where they are causing significant problems. It's truly best to just leave them alone.

All that said, cats can experience a number of lumps, ranging from abscesses to malignant tumors. I've gone into detail about the one that sounds most likely to me by your description, but you should have a vet properly diagnose her, and treat her, if necessary. Good luck!



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The areas in which I have gained the most experience are cat health and feral cat management/rescue. I provide supportive care to chronically ill cats, hospice care to terminally ill cats and also am involved in trap-neuter-return efforts. My specialities lie in taming feral cats and in the allopathic treatment of cats with illnesses or special needs. I also have owned Siamese, Himalayans, Abyssinians, Russian Blues, Savannahs, Bengals, Peterbalds, Don Sphynx and Oriental Shorthairs and am well-versed in cat breeds as well as cat behavior and nutrition.


I have 15 years of extensive experience with cats ranging from breeding to medical care. My daily routine consists of caring for cats with diabetes, thyroid disease, kidney failure, feline leukemia, feline AIDS as well as feral cats. I have experience with liver patients, heart patients, feline infectious peritonitis, cancer, recovery from amputation and trauma, congenital deformities and most every disease in between. I have assisted cats giving birth and hand-nursed kittens who were neglected by their mother from 2 days old through weaning.

15 years' hands-on experience. Current nursing student. I've studied the parallels of human and cat anatomy as well as zoonotic disease, so my studies are broadening the depth of my understanding of feline anatomy, physiology and pathology.

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