Horse Sweet Itch Management | Animal Welfare Hub

Sweet itch (Culicoides hypersensitivity) causes intense pruritus in affected horses from biting midge bites, leading to severe self-trauma and a significantly reduced quality of life if unmanaged.

Key Facts

Sweet itch affects an estimated 5% of horses in temperate climates
The condition is a hypersensitivity response to the saliva of Culicoides midges
Affected horses rub themselves raw on any available surface, causing hair loss, skin thickening, and open wounds
Turnout and stable management to reduce midge exposure — early stabling, field choice away from water — is the primary intervention
Whole-body sweet itch rugs reduce midge access to skin and significantly decrease self-trauma

Welfare Considerations

Sweet itch causes intense, unrelenting pruritus that dominates the welfare experience of affected horses during the midge season. The itch drives compulsive rubbing that causes self-inflicted wounds to the mane, tail, and back — wounds that attract flies, become infected, and cause additional suffering. The condition is lifelong and progressive, with affected horses often becoming more reactive with each season. Management reduces rather than eliminates symptoms, but effective management — appropriate rugs, strategic stabling, insect repellents, and medical support when needed — can give affected horses a genuinely good quality of life.

What You Can Do

Stable affected horses at dawn and dusk when Culicoides midges are most active
Choose field locations away from standing water, boggy ground, and woodland edges where midges breed
Invest in a well-fitted, high-quality sweet itch rug that covers vulnerable areas including mane and tail base
Apply effective insect repellents regularly during the midge season
Discuss immunotherapy options with your vet — desensitization programs are available for sweet itch in some countries