ICD-11 classes
14 Diseases of the skin
Skin disorders involving specific cutaneous structures
Disorders of the dermis and subcutis
Disorders of subcutaneous fat
EF00 — Panniculitis
EB31 — Erythema nodosum

ICD-11 EB31 — Erythema nodosum

An erythematous eruption commonly associated with drug reactions or infection and characterised by inflammatory nodules that are usually tender, multiple, and bilateral. These nodules are located predominantly on the shins with less common occurrence on the thighs and forearms. They undergo characteristic colour changes ending in temporary bruise-like areas. This condition usually subsides in 3-6 weeks without scarring or atrophy.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.

The diagnosis is coded elsewhere:

• Inflammatory erythemas and other reactive inflammatory dermatoses #15750