Even seemingly mild head injuries, where you don't lose consciousness, can cause permanent behavioral and cognitive problems, such as memory loss, inability to concentrate, sleep disorders and, in some cases, permanent disability or death. Trauma to the brain can occur as a result of an impact, which can cause a concussion or open skull fracture, or a jarring motion, such as a quick turn or sudden stop. These are just a few of the reasons people give for not wearing a helmet while roller skating, inline skating, riding a bicycle, scooter or motorcycle, or engaging in other potentially risky outdoor activities.īut according to Nicole Boniquit Levy, MD, a primary care sports medicine specialist at Rush University Medical Center, there are no valid excuses for not strapping on this vital piece of protective gear. I'm not going to fall, so I don't need one.