There are three basic forms "rodent ulcers" (ulcers involving the upper lip); eosinophilic plaques which are large ulcerated areas on the under surface of the body often surrounded by reddened itchy skin; and linear granuloma (raised crusty sores on the back of the thigh region).

All of these conditions are considered to be secondary to some form of allergy however the underlying trigger may not be detectable. Treatment is symptomatic using corticosteroids and antibiotics.