Several weeks: In general, the symptoms of a concussion may take up to 6 weeks to go away. The symptoms are varied and include headache, clouded mentation, nausea/vomiting, ringing in the ears, dizziness, fatigue, to name a few. If there is not improvement after about 6 weeks, your physician may get a ct or MRI scan of the brain to make certain that there isn't a structural problem like a subdural hematoma.
Answered 6/10/2014
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Few weeks: A few weeks in general. Changes in your sleep - waking cycle and ability to focus/concentrate may take longer.
Answered 6/5/2014
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