Symptoms vary greatly depending on the severity of the head injury, but may include any of the following: Vomiting, Lethargy, Headache, Confusion, Paralysis, Coma, Loss of consciousness, Dilated pupils, Vision changes (blurred vision or seeing double, not able to tolerate bright light, loss of eye movement, blindness), Cerebrospinal fluid (CSF) (which may be clear or blood-tinged) coming out of the ears or nose, Dizziness and balance problems, Breathing problems, Slow pulse, Slow breathing rate, with an increase in blood pressure, Ringing in the ears or changes in hearing, Cognitive difficulties, Inappropriate emotional responses, Speech difficulties (slurred speech, inability to understand and/or articulate words), Difficulty swallowing, Body numbness or tingling, Droopy eyelid or facial weakness, Loss of bowel control or bladder control.