Research is finding that mild traumatic brain injuries (MTBIs), or concussions, are much more common than previously thought in children. A mild traumatic brain injury can result from a direct or indirect blow to the head and from an impact somewhere else on the body where the impelling force is transmitted to the head, such as in a sudden stop. It is now estimated that more than 1 million children a year experience an MTBI, and some studies suggest that number may actually be closer to 3 million to 5 million children a year. In the United States these injuries are responsible for 2,700 deaths a year, 37,000 hospitalizations, 435,000 emergency room visits, and more than 125,000 visits to the pediatrician. Concussions occur when the cerebrospinal fluid surrounding the brain is insufficient in cushioning the brain during an impact. As a result, the brain can slam against the interior of the skull. Symptoms of a mild traumatic brain injury include changes in physical, cognitive and emotional functioning. Physical symptoms express themselves as loss of consciousness, headaches, ringing in the ears, slurred speech, fatigue, dizziness, light sensitivity, nausea/vomiting, problems balancing and visual impairment (blurred or double vision). Disturbance in cognitive functioning such as memory loss, trouble focusing and feeling “foggy” can occur as a result of a MTBI. Recent research has highlighted the emotional difficulties faced that present themselves as irritability, sadness, anxiety and increased emotional sensitivity. In adults who have suffered a number of MTBIs there was a strong correlation between the brain injuries and chronic depression which has presented itself as suicidal tendencies. With all the information that research has found on concussions and traumatic brain injuries it is imperative to seek medical help to prevent further brain injury and dysfunction. Rest is necessary for in all cases.