Erythema nodosum (EN) is an infrequent but well-described extraintestinal manifestation of inflammatory bowel disease (IBD). We report a case of a previously healthy 8-year-old girl who presented to her primary care manager with a chief complaint of EN and was later found to have Crohn's disease. This article reviews the causes of EN, the significance of EN in IBD, and the recommended diagnostic approach to IBD in children.