Q. Last week, my 12-year-old son fell while skiing and injured his left shoulder. At the emergency room, he was diagnosed with a non-displaced clavicle fracture and his left arm was put into a sling.

Fractures of the clavicle or collarbone commonly occur when falling off a bicycle. Darin Oswald Idaho Statesman file Q. Last weekend I fell off my bicycle and landed on my left shoulder. I felt a ...