Lumps and bumps are super?cial abnormalities with a wide aetiology, including both congenital and acquired causes. They may appear suddenly in childhood, or present as a deformity at birth; the lesions may be symptomatic or present as an incidental finding. The presentation takes the opportunity of bringing together both the clinician and radiologist perspectives to the investigation and management of lumps and bumps in children to help answer the question of when is ultrasound useful and how?