If raising your arm overhead makes you wince — or you've noticed a nagging ache deep in your shoulder that's worse at night — you may be dealing with shoulder impingement syndrome. The good news: most people get significant relief with the right exercises for shoulder impingement, combined with targeted non-surgical treatment. This guide walks you through what impingement is, how it's diagnosed, which exercises help most, and when it may be time to see an orthopedic specialist.