"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Having a circular rash can spark fears that you’ve picked up ringworm. After all, the fungal infection is ...
Erythema migrans and erythema multiforme both cause target- or bull’s-eye-shaped lesions. Erythema migrans is due to Lyme disease. Erythema multiforme is an immune-mediated hypersensitivity skin ...