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how long does concussion last

Most concussions improve significantly within about 1–4 weeks, but symptoms can sometimes last for several months and, in a smaller group, more than a year (post‑concussion syndrome). Recovery time varies a lot from person to person, depending on factors like age, prior concussions, and how symptoms are managed after the injury.

Typical recovery timeline

  • Many adults and teens recover enough to feel mostly normal in about 10–14 days.
  • Doctors often say “a few weeks” is a common window, with many people better within 1 month.
  • Children and older adults can take longer and may need more cautious follow‑up.

When symptoms last longer

  • If symptoms (headache, dizziness, brain fog, etc.) persist beyond about 3 months, it may be called post‑concussion syndrome.
  • These persistent symptoms can last months and occasionally more than a year, but they still often improve over time with proper management.
  • A small percentage of people develop long‑lasting issues, especially with repeated concussions or other risk factors like anxiety or depression.

Red‑flag signs: get urgent help

Seek emergency care immediately if after a head injury you notice:

  • Worsening or severe headache, repeated vomiting, or increasing confusion.
  • Weakness, slurred speech, seizures, trouble waking up, or one pupil larger than the other.
  • Any sudden behavior change or loss of consciousness lasting more than a brief moment.

What helps recovery

  • Short rest (24–48 hours) followed by a gradual, guided return to normal activities usually supports better recovery than long total rest.
  • Limiting screens, intense work/study, and heavy exercise at first, then increasing activity as long as symptoms don’t flare, is commonly recommended.
  • If symptoms are not clearly improving after a couple of weeks—or are affecting school, work, or mood—seeing a concussion‑experienced clinician or clinic is important.

If you or someone you know has had a head injury and still feels “off,” it is safest to get personally evaluated, even if the injury seemed mild.