• Headache
• Bleeding from wound, ears, nose, or around eyes
• Drainage of clear or bloody fluid from ears or nose
• Loss of consciousness
• Confusion
• Convulsions
• Restlessness, irritability
• Drowsiness
• Slurred speech
• Difficulties with balance
• Visual disturbances
• Nausea
• Vomiting
• Swelling
• Bruising behind the ears or under the eyes
• Changes in pupils (sizes unequal, not reactive to light)
• Stiff neck

Note: The only symptom may be a bump on the head.