Headache or pressure in the head
Nausea or vomiting
Dizziness or balance problems
Blurry or double vision
Sensitivity to light or noise
Feeling slowed down, drowsy, or “foggy”
Confusion or trouble concentrating
Memory problems or trouble remembering events
Feeling unusually irritable, sad, nervous, or emotional
Sleep problems (sleeping more or less than usual)
Ringing in the ears
Problems with coordination or clumsiness
Loss of consciousness (may occur, but not required)
Symptoms that start right away or appear hours to days after the injury
Seek emergency care immediately if any of the following occur:
Worsening headache
Repeated vomiting
Seizure
Increasing confusion, agitation, or unusual behavior
Weakness or numbness in the arms or legs
Slurred speech
Trouble walking or worsening balance
One pupil larger than the other
Loss of consciousness that lasts more than a short time
Clear fluid or blood from the nose or ears
A severe or worsening neck injury
Symptoms after a high-impact injury (car crash, fall from height, sports collision with significant force) or if you’re on blood thinners
If you suspect a concussion, contact a healthcare professional promptly for guidance and evaluation