How long does a concussion last?
Last updated September 3, 2026.
Most people recover within a few weeks, but the honest range is days to months - and symptoms can appear days after the hit. Recovery runs on relative rest for a day or two, then a gradual stepwise return, holding each step symptom-free. The absolute rules: never back to play the same day - a second hit before healing is genuinely dangerous - and emergency care for worsening headache, repeated vomiting, unequal pupils, slurred speech, confusion, or seizure.
What to do
- Watch for 48 hours. Late-appearing symptoms are real - someone should keep an eye on the injured person.
- Rest relatively, then ramp. A day or two quiet, then gradual return - strict dark-room rest for weeks is outdated.
- Hold the same-day rule. No sports, no risky activity the day of the injury, full stop.
- Escalate the red flags and the long tail. Emergency signs now; symptoms past a few weeks get a concussion-savvy clinician.
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