Erythema multiforme: An allergic inflammatory skin disorder which has a variety of causes and results in skin and mucous membrane lesions that affect mainly the hands, forearms, feet, mouth nose and genitals.
Granuloma annulare: A harmless skin disease characterized by raised, bumpy, ring-shaped skin lesions.
Nummular dermatitis: A skin disorder characterized by the development of round or oval skin lesions which itch and burn. In the initial stages, small red spots or blisters form and the grow and joint together to form a patch. The lesion eventually looks similar to a ringworm infection with a clear centre and a distinct border. The causes of some cases includes mercury fillings and allergy to rubber, nickel, formaldehyde or neomycin.