A person with a mild concussion or traumatic brain injury may experience:
- Headache
- Confusion
- Lightheadedness
- Dizziness
- Blurred vision
- Ringing in the ears
- Tiredness or sleepiness
- A bad taste in the mouth
- A change in sleep habits
- Behavior or mood changes
- Trouble with memory, concentration, attention, or thinking
- Loss of consciousness lasting a few seconds to minutes
- Sensitivity to light or sound
- Nausea or vomiting
A person with moderate or severe concussion or traumatic brain injury may have some of the following symptoms in addition to those listed above:
- Headache that gets worse or won't go away
- Repeated vomiting or nausea
- Slurred speech
- Convulsions or seizures
- An inability to wake up from sleep
- Enlargement of the pupil (dark center) of one or both eyes
- Numbness or tingling of arms or legs
- Loss of coordination
- Increased confusion, restlessness, or agitation
- Loss of consciousness lasting a few minutes to hours
A person who suffers a blow to the head or another trauma that may have caused a TBI should seek medical attention.
Sources: