How long does concussion recovery take?

Most people are substantially better within a couple of weeks. But recovery is rarely a straight line, and the honest answer depends on symptoms, age, sleep and how the first fortnight is handled.

Key takeaways

• Most adults improve substantially within one to four weeks of a concussion.
• Children and teenagers often take longer than adults — up to about four weeks is common.
• Roughly 10–30% of people have symptoms beyond a month; that is common, not a separate illness.
• Recovery zigzags: good days followed by setbacks are normal and not a sign of damage.
• Poor sleep, prolonged rest, alcohol, previous concussions and high early symptom load all slow it.

The usual timeline

Symptoms are typically heaviest in the first 24–72 hours: headache, fog, light and noise sensitivity, poor sleep, irritability, feeling drained. From there most adults see steady improvement over one to four weeks. Sport-related concussion in adults often resolves faster, frequently inside two weeks, partly because it is recognised and managed immediately.

Children and adolescents generally recover more slowly than adults, and up to four weeks is considered a normal course for them rather than a warning sign.

Why it feels like a zigzag

Almost nobody improves in a straight line. A good day invites a full day of work, screens and social noise; the next day the fog and headache come back, and it feels like a relapse. It usually is not. It is the same tank emptying faster than it used to.

The practical answer is to compare weeks rather than days. That is much easier with a written record than from memory — see tracking recovery after a head injury.

When symptoms last longer than a month

Somewhere between one in ten and one in three people still have symptoms after four weeks. This is described as persisting symptoms after concussion. It is common, it is recognised, and it is not evidence that something was missed on a scan — routine imaging is normally normal in concussion.

What tends to keep it going is treatable: unrefreshing sleep, low activity levels, neck and vestibular problems, headache that has taken on a migraine pattern, and the anxiety that grows when nobody can tell you when it will end. Each of those has its own management, which is why a proper review after four weeks is worth asking for.

Seek urgent care at any stage

A worsening or severe headache, repeated vomiting, weakness, numbness, slurred speech, seizures, unequal pupils, fluid from the nose or ears, or growing drowsiness or confusion all need emergency assessment — including weeks after the original injury.

What makes recovery slower

• A high number of symptoms in the first days, especially dizziness and heavy fog.
• Previous concussions, particularly a recent one.
• Broken or short sleep through the first fortnight — see sleep and memory.
• Complete rest for more than about two days, which prolongs rather than shortens recovery.
• Alcohol while symptomatic — see alcohol and memory.
• Pre-existing migraine, anxiety, depression or ADHD.
• Returning to full duties or sport before symptoms settle, and a second knock during recovery.

What helps it along

• 24–48 hours of relative rest, then a gradual, symptom-guided return to normal activity.
• Early light aerobic exercise below the level that provokes symptoms, with clinical advice.
• Protecting sleep with regular hours and no alcohol.
• Working in short blocks with real breaks instead of long pushes.
• Treating the specific problem — headache, neck, balance, mood — rather than waiting it out.

What about returning to sport, work or driving?

Those are clinical decisions and no website or app can make them. Return-to-play and return-to-work pathways are staged and supervised, and a second concussion before the first has healed carries real risk. Ask the clinician who assessed you.

How Memo complements this

Memo can show you how your own week-to-week pattern is moving, which is a useful thing to bring to that conversation. It is a wellness companion, not a diagnostic or clearance tool. Start with the concussion recovery check or read about brain fog after a concussion.

Sources

• CDC HEADS UP — concussion information
• NHS — Concussion
• NICE NG232 — Head injury: assessment and early management
• Consensus statement on concussion in sport (Amsterdam 2022), BJSM
• Headway — the brain injury association

Frequently asked questions

How long does a concussion take to heal?

Most adults improve substantially within one to four weeks, with the worst symptoms in the first few days. Children and teenagers commonly take up to about four weeks. A minority have symptoms lasting longer than a month, which usually still improves with the right management.

Why do my symptoms come back after a good day?

Because activity tolerance recovers more slowly than symptoms do. A good day often means doing much more, and the next day the fog and headache return. Setbacks like this are normal in recovery; the useful comparison is week against week, not day against day.

Is it bad if I still have symptoms after a month?

It is common rather than bad. Somewhere between about 10% and 30% of people have symptoms beyond four weeks, described as persisting symptoms after concussion. It is worth a medical review at that point, because sleep, headache, neck, balance and mood problems that keep it going can each be treated.

Should I rest in a dark room until the symptoms go?

No. Beyond the first day or two, prolonged rest and avoidance of all activity are associated with slower recovery. Current guidance is brief relative rest followed by a gradual, symptom-guided return to activity, including light aerobic exercise.