Companion Animals

Horse Sweet Itch: Management and Quality of Life

Sweet itch (summer seasonal recurrent dermatitis) causes severe itching and self-trauma in susceptible horses. It significantly affects quality of life and requires consistent management throughout the midge season.

Key Facts

Sweet itch affects around 5% of UK horses and is caused by allergy to Culicoides midge saliva
Lesions typically affect the mane, tail, and dorsal midline
Clinical signs begin at ages 1-5 years and worsen with each sensitisation season
Equine sweet itch cannot be cured but can be effectively managed
Protective rugging (summer sheets, face masks) reduces midge access
Immunotherapy (desensitisation injections) has shown promise in clinical trials

Welfare Considerations

Sweet itch causes intense, chronic pruritus (itching) that leads to self-mutilation, broken mane and tail hair, and disturbed sleep in severely affected horses. The welfare impact across the entire midge season (April-October) is substantial. Left unmanaged, horses may rub themselves raw and develop secondary skin infections. Consistent, proactive management from the start of midge season prevents the cycle of sensitisation and self-trauma.

What You Can Do

Apply sweet itch protective rugs before the first warm evenings in spring
Stable susceptible horses at dawn and dusk when midges are most active
Apply insect repellents regularly, particularly around the mane and tail
Consult a vet about antihistamines or immunotherapy for severe cases
Manage pasture to reduce midge breeding areas (avoid stagnant water)