Medically reviewed by Jordana Haber Hazan, MD A horsefly bite, caused by a fly of the Tabanidae family, is painful but usually harmless, causing a raised, red area of skin known as a weal (much like a ...

Countryside dwellers will know all too well the horrendous pain that comes with horsefly stings ... or stung is the obvious redness and swelling. The bite might start to itch or form a rash ...