Dermatophytids are fungus-free disseminated skin lesions resulting from induced sensitization in patients with ringworm infections.:301 Dermatophytids are fungus-free disseminated skin lesions resulting from induced sensitization in patients with ringworm infections.:301 The most common dermatophytid is an inflammation in the hands resulting from a fungus infection of the feet. Dermatophytids normally disappear when the primary ringworm infection is treated.Dermatophytids may resemble erythema nodosum.