The signs and symptoms of a concussion can be subtle and may not show up immediately. Symptoms can last for days, weeks or even longer. Common symptoms after a concussive traumatic brain injury are headache, loss of memory (amnesia) and confusion. An athlete with a suspected concussion should not return to play until he or she has been medically evaluated by a health care professional trained in evaluating and managing concussions. Mayo Clinic provides a comprehensive evaluation for diagnosis and management of concussions that includes specialist from Neurology, Neuropsychology, Audiology and others as needed.