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Updated on September 23rd, 2025
Pet's info: Cat | Mixed Breed | Female | unspayed | 1 year and 11 months old | 10.8 lbs
My cat's skin towards the back has been twitching from time to time since I got her (just a couple of twitches a day) and it seems like excitement/irritation triggers it so I wasn't worried. Recently she started having these random "episodes" of hissing and growling at it's back end, primarily it's tail. She's eating well and has tons of energy. According to the vet there's nothing wrong physically, but I'm worried it could be FHS, does it get worse over time? And what can I do to treat her?
3 Answers

Answered By Linda G, MS, DVM
Veterinarian
Published on November 7th, 2019
Answered By Christie Long, DVM
Veterinarian, Certified Veterinary Acupuncturist
Published on June 2nd, 2018
You should know that Feline Hyperesthesia Syndrome is a very rare disease, but if this is what Lightning has it can be very difficult to treat. You said she doesn't have fleas, however most of the time this is in fact the culprit; so much so that it warrants treating for fleas even if you don't see any. Also, some of these cats actually have an allergy to their food, so it's worth trying a hypoallergenic diet trial.
1Pet Parents found this answer helpful
Answered By Andrea M. Brodie, DVM
Veterinarian
Published on June 25th, 2018
It is quite likely the flea infestation that is causing this. However, if after you get rid of the fleas your cat is still having these "jump" reactions you should take her to your vet for an exam to rule out Feline Hyperesthesia Syndrome and similar conditions.
1Pet Parents found this answer helpful