What is erythema multiforme?
A person with erythema multiforme has an allergic rash that looks like bull's eye targets on the skin surface. Erythema multiforme is caused by an infection or allergy. Most cases occur in people who are between 20 and 40 years old, and resolve within 3 weeks. Stevens-Johnson syndrome is a severe form of erythema multiforme.

What are the symptoms of erythema multiforme?
Symptoms of erythema multiforme include a rash that looks like a bull's eye target; pale center surrounded by a red ring. The rash may form blisters in the center of the target. The rash often spreads rapidly and can involve the mouth, eye, intestines, joint, and genitals. Other symptoms include eye pain, eye redness, eye discharge, vision changes, oral ulcers, and genital sores.

How does the doctor treat erythema multiforme?
The treatment for erythema multiforme depends on the underlying cause. Treatment for erythema multiforme may include intravenous fluids, warm wet compresses, saltwater oral rinses, antiviral medications, and corticosteroids.