In this procedure, a correct diagnosis by intradermal or blood testing is necessary. The dog is then given injections of small but increasing doses of the allergy-causing substance at varying intervals for up to 12 months. Lifelong response may take up to 12 months. Fleas are the most common parasitic skin disease found in dogs. Mange is another type of skin disease which is caused by mites.
Ear mites, lice, and ticks are other parasites that affect dogs.
Their presence irritates the dog, leading to self-mutilation. A dog's ears, front legs, chest and abdomen are most often affected by sarcoptic mange. Demodectic mange can cause itching. The face and front legs are most commonly affected, although some cases may be generalized. Generalized demodectic mange is often a sign of underlying internal disease or a hereditary problem.