Is it normal to get really tired during the day and have no energy when you have a concussion?

Yes: What is called the Post Concussive Syndrome is a collection of symptoms that can affect some patients after a concussion. The symptoms can last from weeks to 6 months or longer. The cause is not certain. Some of the symptoms are: headache, dizziness, blurred vision,difficulty concentrating and remembering, anxiety and depression, sleep disturbance and fatigue. SEE: http://bit.ly/1ogdmaJ