"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 ...

Histopathologic finding of a dermal hypersensitivity reaction, along with the characteristic clinical appearance, confirmed the diagnosis of erythema migrans (EM). Introduced in 1909, EM was described ...

A 43-year-old woman presented with 6 months of recurrent bilateral eye pain and redness alongside spontaneous urticaria. She noted episodes of quarter-sized itchy lesions appearing on her abdomen, ...

If you've ever self-diagnosed your inflamed, itchy scalp with eczema just to have your dermatologist tell you it's actually psoriasis, you're not alone. The two conditions are extremely similar in ...

Hives are itchy red or white bumps that often stem from an allergic reaction. Some rashes are contagious, but hives are not spread from person to person. Corticosteroids and biologics can treat both ...