Symptoms of a brain injury or traumatic brain injury can first occur immediately after the traumatic event. However,sometimes it appears days or weeks later. Physical symptoms can range from a loss of consciousness or a state of being dazed or confused or disoriented, headaches, nausea, or vomiting, fatigue or drowsiness, difficulty sleeping or sleeping more than usual or dizziness or loss of balance. You can have sensory symptoms like blurred vision or ringing in the ears or a bad taste in your mouth or sensitivity to light or sound. You could have cognitive or mental symptoms like memory problems or concentration problems or mood changes or mood swings or feelings of depression or feelings of anxiousness.