ComplicationsBy Mayo Clinic staff
Potential complications of concussion include:
- Epilepsy. People who have had a concussion double their risk of developing epilepsy within the first five years after the injury.
- Cumulative effects of multiple brain injuries. Evidence exists indicating that people who have had multiple concussive brain injuries over the course of their lives may acquire lasting, and even progressive, cognitive impairment that limits functional ability.
- Second impact syndrome. Sometimes, experiencing a second concussion before signs and symptoms of a first concussion have resolved may result in rapid and typically fatal brain swelling. After a concussion, the levels of brain chemicals are altered. It usually takes about a week for these levels to stabilize again. However, the time it takes to recover from a concussion is variable, and it is important for athletes never to return to sports while they're still experiencing signs and symptoms of concussion.
- Head injury. American Academy of Pediatrics. http://www.healthychildren.org/English/health-issues/injuries-emergencies/Pages/Head-Injury.aspx. Accessed Dec. 2, 2010.
- Halstead ME, et al. Clinical report — Sport-related concussion in children and adolescents. Pediatrics. 2010;126:597.
- Heads up: Concussion in youth sports. A fact sheet for parents. Centers for Disease Control and Prevention. http://www.cdc.gov/concussion/pdf/parents_Eng.pdf. Accessed Dec. 2, 2010.
- Traumatic brain injury. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/print/sec21/ch310/ch310a.html. Accessed Dec. 2, 2010.
- Evans RW. Concussion and mild traumatic brain injury. http://www.uptodate.com/home/index.html. Accessed Dec. 2, 2010.
- Lovell M. The neurophysiology and assessment of sports-related head injuries. Neurologic Clinics. 2008;26:45.
- Heegaard W, et al. Traumatic brain injury. Emergency Medicine Clinics of North America. 2007;25:655.
- Schutzman S. Minor head trauma in infants and children. http://www.uptodate.com/home/index.html. Accessed Dec. 2, 2010.
- Wetjen NM, et al. Second impact syndrome: Concussion and second injury brain complications. Journal of the American College of Surgeons. 2010;211:553.
- Lovell M. The management of sports-related concussion: Current status and future trends. Clinics in Sports Medicine. 2009;28:95.
- Position statement on sports concussion. American Academy of Neurology. http://www.aan.com/globals/axon/assets/7913.pdf. Accessed Jan. 10, 2010.
- McCrory P, et al. Consensus statement on concussion in sport: 3rd International Conference on Concussion in Sport held in Zurich, November 2008. Clinical Journal of Sport Medicine. 2009;19:185.