What is erythema nodosum?

Erythema nodosum is a skin disorder characterized by tender, swelling, red nodules under the skin. The area starts out slightly raised and bright red and then turns to a purplish red, as they start to fade they turn yellow. The cause is usually linked to medications, infections, or other conditions.

How do members experience erythema nodosum?

*Reports may be affected by other conditions and/or medication side effects. We ask about general symptoms (anxious mood, depressed mood, fatigue, pain, and stress) regardless of condition.

*Data from patients with erythema nodosum, who have ever reported treatments, ordered by their reporting frequency during the last 5 years.