Insect bite hypersensitivity (IBH) is an allergic reaction to the saliva of biting insects such as Culicoides (aka “no-see-ums,” midges, gnats), mosquitoes, black flies, and horn flies. The bites elicit an allergic response from sensitive horses, resulting in hives (urticaria) and/or crusty patches of bumps. Download this free guide to learn how to help your itchy horse!