Understanding Photosensitivity in Horses

Photosensitivity is a severe skin dermatitis that occurs in the nonpigmented (white skinned) areas of horses when exposed to sunlight, following ingestion or contact with certain plants or secondary products that are UV or light reactive. For additional information and current updates on photosensitivity in horses, and preventative options available, visit HorseDVM's Photosensitivity Page.