Etymed
erythema nodosum
Definition
A skin condition characterized by red, tender nodules, typically on the lower legs
Clinical context
A 20-year-old woman presents with painful, red nodules on her lower legs that have developed over the past week. She recently had a respiratory infection and reports joint pain. Physical examination reveals tender, violaceous nodules on both lower legs with some surrounding erythema.
Mnemonic
RED legs - nodosum causes tender, red nodules on lower extremities