 [ Symptoms ] persistent repetition of words, depression, nausea, inability to create new memories, lack of restraint, post-traumatic seizure, abnormal laughing and crying, vomiting, slurred speech, raccoon eyes, dilated pupil, loss of smell, a temporary moment of clarity, stiff muscles, ringing in the ears, dizziness, blackout, mental confusion, inability to recognise common things, impulsivity, inability to understand language, sensitivity to light, sensitivity to sound, unequal pupils, fatigue, aggression, inability to speak language, balance disorder, amnesia, apathy, anger, persistent headache, nerve injury, difficulty thinking and understanding,  persistent repetition of actions, irritability, bruising, blurred vision, fainting, anxiety, difficulty concentrating, bone fracture, bleeding, loneliness, difficulty speaking [ Disease ] Traumatic brain injury