Headache
Dizziness or balance problems
Nausea or vomiting
Confusion or feeling “foggy”
Memory loss around the injury
Trouble concentrating
Blurred or double vision
Sensitivity to light or noise
Drowsiness or fatigue
Slurred speech
Slow responses
Irritability, mood changes, or unusual behavior
Brief loss of consciousness
Ringing in the ears
Sleep changes
Seizure
Unequal pupils
Weakness or numbness
Worsening symptoms over time
Severe headache
Repeated vomiting
Increasing confusion
Fainting
Trouble waking up
Neck pain
Blood or clear fluid from the nose or ears