Behçet's disease is rare, especially in the paediatric population. In this case, a healthy 16-year-old made presented with discrete scrotal ulcers and systemic illness. He was found to have Fournier's gangrene and with subsequent investigation was diagnosed with Behçet's disease as an underlying cause. A PubMed search reveals no similar case reports. His only risk factors for Fournier's gangrene was his raised body mass index. His only risk factor for Behçet's disease was his ethnic origin. An understanding of risk factors and epidemiology can raise suspicion of these rare pathologies.