With concussion, function may be interrupted but there is no structural damage to the brain. The severity is determined by how long signs of concussion last and so can only be known after someone has recovered. The doctor will make sure that there are no severe or life-threatening injuries first and then will further evaluate the severity of the head injury. As kids enter adolescence, they experience rapid height and weight gain.
You may be irritable, have trouble concentrating, be unable to remember things, have headaches, dizziness, and blurry vision. It is essentially a head injury that affects how the brain works. However, the actual figure could be much higher, as many people do not seek treatment for concussion. Concussions were the second most common sports-related injury.