Cat Feline Hyperesthesia Syndrome

Feline hyperesthesia syndrome is a poorly understood condition causing skin sensitivity, compulsive behaviour, and apparent distress — with welfare implications that require careful management.

Key Facts

Feline hyperesthesia syndrome (FHS) involves episodes of skin rippling, frantic tail chasing, self-directed aggression, and apparent hallucinations.
Episodes can be triggered by touch along the back and often occur in waves with calm periods between.
The condition is associated with seizure activity in some cats, and anti-epileptic medication can reduce episode frequency.
Anxiety, compulsive disorder, and skin hypersensitivity may all contribute to FHS in different individuals.
Affected cats show pupil dilation, vocalisation, and frantic running during severe episodes, suggesting significant distress.

Welfare Considerations

FHS causes genuine distress that is distressing to witness and experience. Cats during episodes appear to be reacting to painful or intensely uncomfortable sensations they cannot control or escape. Welfare management focuses on reducing episode triggers, providing environmental stability, and addressing anxiety through enrichment and medication. Because the condition is poorly understood, cats with FHS benefit from multi-modal veterinary assessment including dermatology, neurology, and behavioural evaluation to identify and address all contributing factors.

What You Can Do

Seek veterinary assessment for cats showing skin-rippling episodes, frantic behaviour, or self-directed aggression.
Keep a video diary of episodes to share with your vet — visual evidence greatly aids diagnosis.
Reduce environmental stressors and provide predictable routines for cats with known FHS.
Ask your vet whether anti-epileptic or anti-anxiety medication would benefit your affected cat.