An open fracture is when the bone protrudes through the skin and there is a risk of infection in the bone. | Free And Accurate Test. And the challenge with creating a precise quiz is that you cannot distinguish between fracture and sprain due to their similarities. This quiz will tell you 100% honestly, Amazing NBA quiz only 40% of real fans can pass, Stranger Things Quiz Just Real Fans Score 80%, Amazing Naruto Quiz. Fractures can cause mild or dull pain, and sprains can often cause severe pain. [1] [CDATA[/* >