Headache
Dizziness or balance problems
Nausea or vomiting
Confusion or feeling dazed
Trouble remembering the injury or events before or after it
Blurred or double vision
Sensitivity to light or noise
Feeling unusually tired or sleepy
Trouble concentrating
Slowed thinking or responding
Mood changes, irritability, or sadness
Sleep changes
Loss of consciousness, even briefly
Worsening symptoms over time
Seek urgent medical care if you have repeated vomiting, severe headache, seizures, weakness, numbness, slurred speech, unequal pupils, or trouble waking up