Even mild brain injuries can affect a person’s physical, emotional, or psychological behavior. Common symptoms of a brain injury can include, but are not limited to, headaches, blurred vision, nausea, vomiting, irritability, depression, fatigue, and changes in mood. Brain injuries can also disrupt impulse control and behavior management. Each brain injury sufferer is unique, which is why it is important to seek medical care any time the head is impacted by force.