Horse Sweet Itch Management and Welfare

Sweet itch is a severe, chronic allergic skin condition caused by midges biting horses. Affected animals experience intense itching, self-trauma, and long-term coat and skin damage.

Key Facts

Sweet itch is caused by an allergic hypersensitivity to salivary proteins of Culicoides midges
Affected horses rub mane, tail, withers, and belly obsessively against fences, trees, and stables
The condition is hereditary and cannot be cured, only managed throughout the horse's life
Hair loss, skin thickening, crusting, and open sores develop with repeated self-trauma
Management centres on preventing midge access using specialised rugs, stabling, and repellents
Some horses develop severe secondary infections requiring antibiotic and anti-inflammatory treatment

Welfare Considerations

Sweet itch causes intense, unrelenting itching that drives affected horses to cause serious self-injury. The psychological and physical impact is severe — horses cannot rest from the constant irritation during the midge season, and the cumulative damage over years permanently alters coat and skin condition. Inadequate management represents chronic suffering that is entirely preventable with appropriate intervention.

What You Can Do

Fit a correctly sized sweet itch rug covering belly, neck, and face during Culicoides season
Stable horses at dawn and dusk when Culicoides activity peaks
Apply veterinary-recommended insect repellents, particularly to mane, tail, and belly areas
Choose field locations away from standing water and woodland edge, where midges breed and rest
Discuss antihistamine or corticosteroid treatment with your vet for severely affected horses
Consider genetic testing before breeding from affected horses to reduce inherited risk