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Feline hyperesthesia
Feline hyperesthesia is a poorly understood disorder in which the skin of the back, especially around the lower back and base of the tail, becomes abnormally sensitive. The cat reacts dramatically to a simple touch. The attacks are brief an...
What is it?
Feline hyperesthesia is a poorly understood disorder in which the skin of the back, especially around the lower back and base of the tail, becomes abnormally sensitive. The cat reacts dramatically to a simple touch. The attacks are brief and impressive: the skin on the back undulates, the cat suddenly turns towards its side, bites itself, runs for no reason, then everything returns to normal. This is not a diagnosis that we make straight away. It is a set of signs which can correspond to pain, a skin problem, a nervous disorder or a behavioral disorder: the role of the veterinarian is precisely to sort it out.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Undulation or rolling of the skin on the back, very visible during the attack.
The cat suddenly turns towards its back or side, as if stung, and stares at that area.
Frantic biting and licking of the base of the tail, flanks or thighs, until areas are hairless.
Dilated pupils, fixed gaze, loud meows.
Sudden running across the room, agitation, fleeing as if being chased.
Hypersensitivity to touch: a caress on the back triggers a disproportionate reaction, sometimes an unusual aggressive gesture.
Tail that whips violently.
Between two attacks, the cat is most often perfectly normal.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
The cause is not uniquely established and several mechanisms are likely at play.
Back pain or damage to the muscles and nerves of the lumbar region is often found.
A skin problem, including a flea bite allergy, causes exactly this type of reaction on the base of the tail.
A nervous disorder such as partial seizure is mentioned in certain cases.
A context of chronic stress – change, difficult cohabitation, boredom, too restricted territory – maintains or triggers the episodes.
The methodical search for these causes is part of the diagnosis; we only conclude that there is a behavioral disorder after having ruled them out.
Young adult cat, the first episodes often appearing before middle age.
Stressful environment: moving, arrival of an animal or a baby, noisy home, poorly stimulated indoor cat.
Flea infestation, even discreet.
History of back or tail trauma.
Certain oriental breeds are reputed to be more affected, without this being formally demonstrated.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Describe the attacks precisely to the veterinarian: duration, trigger, frequency, time of day. A short video taken at home is extremely useful, because the seizure almost never recurs in consultation.
The veterinarian examines the skin for fleas, scabs or lesions, and carefully palpates the spine and base of the tail.
Thorough flea treatment is often the first step, even when no fleas are visible.
Depending on the case: blood test, back x-rays, neurological examination, sometimes advanced imaging.
A lifestyle assessment is carried out in parallel: space, hiding places, heights, play, cohabitation, litter boxes.
Treatment
Treatment depends on the cause identified, which explains why there is no single recipe.
Strict control of fleas on the animal and in the home, with a veterinary product suitable for cats.
Treatment of back pain with veterinary drugs when a painful origin is identified.
Medications acting on the nervous system in forms suggesting a nervous or anxious origin, always on prescription and with monitoring.
Arrangement of the environment: perches, hiding places, scratching posts, short and regular play sessions, fun food dispensers, sufficient number of litter boxes.
During a crisis, we do not intervene: do not catch the cat, do not caress it, let the episode pass in a calm place, then note what preceded it.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
Maintain regular pest protection all year round.
Provide a rich environment: heights, hiding places, accessible windows, daily games.
Anticipate changes in the home by preserving the cat's landmarks.
Avoid caresses pressed on the lower back of a cat who does not tolerate them well.
Consult at the first episodes rather than waiting: pain or an allergy caught early is much easier to resolve.
Possible complications
Licking and biting sores, with hairless areas, scabs and superinfection of the skin.
Tail self-mutilation in severe cases.
Deterioration of the relationship with the household if aggressive gestures during crises are interpreted as meanness.
Anxiety that sets in and maintains the episodes.
When to see a veterinarian
The skin on your cat's back ripples and he turns abruptly towards his side.
He nibbles or licks the base of his tail until he creates hairless areas.
He suddenly starts running, as if panicked, for no visible reason.
He reacted violently to a pat on the back even though he accepted it before.
Episodes become more frequent or longer.
He is injured during attacks: consult without delay.
Prognosis
When a specific cause is found — fleas, back pain, skin problem — the treatment result is often very good.
In other cases, the goal is to reduce the frequency and intensity of seizures rather than making them disappear completely.
Most cats live normally between episodes, with regular monitoring and adjustments.
Frequently asked questions
Is my cat going crazy or naughty?
No. During the crisis, he does not control his reaction and does not act against you. The best thing is not to touch him, leave him in a quiet place, then describe the episode to your veterinarian.
He doesn't have fleas, why treat for fleas?
A flea bite allergy can be triggered with very few parasites, undetectable to the naked eye, and gives exactly this picture at the base of the tail. Rigorous treatment of the animal and housing is part of the diagnostic process.
Should seizures be filmed?
Yes, it is very useful. Episodes almost never recur in consultation, and a video helps the veterinarian distinguish a nervous attack from a painful or skin reaction.
Can it heal on its own?
The episodes may become less frequent, but they often return until the cause is treated. Consulting early avoids licking sores and the onset of lasting anxiety.
References
AAFP — American Association of Feline Practitioners
Content reviewed by the TunisieVet editorial team · Updated 09 August 2026
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