 These symptoms can include things like headaches, light sensitivity, as well as sleep and mood disturbance. While it's understandable that the pressure to compete and the love of a sport can push athletes to minimize, ignore, or deny symptoms, it is both dangerous and foolish to do so. You risk prolonging injury time and long-term damage. There's a saying in sports medicine, when in doubt, sit out. With your body, I'm ABC's Dr. Jennifer Ashton.