What are common concussion symptoms?

Headache, light/noise sensitivity, brain fog, memory changes, dizziness, fatigue, irritability, mood changes, sleep disturbances, and vision disturbances.

What happens to the brain during recovery?

Energy disruption, inflammation response, oxidative stress, neurotransmitter changes, and synaptic/neuroplasticity changes affecting memory and learning.

What is a typical concussion recovery timeline?

Day 0-2 acute phase, Days 3-7 early recovery, Weeks 1-2 subacute, Weeks 2-4 advanced, Week 4+ evaluation and full return.

When should you seek medical attention?

Seek emergency care for severe, sudden, or worsening symptoms. Consult a professional if symptoms persist beyond expected timelines.

Recovery Hub · Research

How your brain recovers from a concussion.

A clear, evidence-informed look at what happens during recovery — the symptoms, the biology, and the timeline — for athletes, parents, clinicians, and anyone making sense of the science.

Start here

Three things to know about concussions

Function, not structure

Most concussions involve temporary changes in how the brain functions — not structural damage.

Recovery varies

Symptoms differ widely from person to person and typically improve over days to weeks.

Pacing matters

Rest, gradual activity, and symptom monitoring are the core of a healthy recovery.

Definition

What is a concussion?

A concussion is a mild traumatic brain injury that temporarily alters how the brain functions — from a direct blow, a transmitted force, or rapid acceleration–deceleration.

During recovery, brain cells experience temporary shifts in energy production, blood flow, neurotransmitter signaling, and ion balance — which can show up as slowed thinking, headaches, dizziness, and sensitivity to light or noise. Most symptoms improve within days to weeks, though recovery depends on severity, prior history, age, and individual neurobiology.

What it feels like

Common symptoms after a concussion

Headache or pressureLight & noise sensitivityBrain fog / slowed thinkingMemory & concentration changesDizziness or balance issuesFatigueIrritability, anxiety, mood changesSleep disturbancesVision disturbances

The five recovery pathways

The systems a concussion disrupts

A concussion strains five interconnected biological systems at once. ConcussionCare+ was formulated to nutritionally support each one.

Energy & mitochondria

Energy demand rises while mitochondrial efficiency temporarily dips — contributing to fatigue and slower processing.

Inflammation

The immune system activates; prolonged inflammation may affect clarity and mood.

Oxidative stress

Free radicals can rise faster than antioxidant defenses, straining cellular health.

Neurotransmitters

Shifts in signaling influence focus, sleep, mood, and cognitive speed.

Synaptic & plasticity

Communication between neurons is affected, influencing memory and learning.

Go deeper

These are the systems. Now see the sequence.

The pathways above are what gets strained. The neurometabolic cascade is when — the hour-by-hour, week-by-week chain of events that follows a hit. We built an interactive version you can trace stage by stage.

Explore the cascade →

What to expect

A typical recovery timeline

Recovery is rarely linear, but most people move through phases like these. Track your symptoms and progress along the way.

Day 0–2

Acute

Symptoms peak
Low stimulation
Rest, hydration, sleep

Day 3–7

Early recovery

Symptoms improving
Light walking
Start tracking

Week 1–2

Subacute

Steady progress
Slow activity increase
Better sleep

Week 2–4

Advanced

Daily routine returns
Focus improving
Watch for spikes

Week 4+

Evaluation

Further care if needed
Provider clearance
Full return

Give it room

What to avoid in early recovery

×Returning to sport too soon

×Pushing through symptoms

×Alcohol

×Screen overload

×Skipping sleep

×Intense workouts

Safety first

When to seek medical attention

Seek care promptly if any of these occur.

!Worsening headache

!Repeated vomiting

!Slurred speech

!Weakness or numbness

!Seizure or fainting

!Major behavioral changes

!Prolonged confusion

!Symptoms worsening, not improving

Always seek emergency medical care for severe, sudden, or worsening symptoms.

Evidence-informed

Strategies that support brain recovery

✓Gradual return to activity

✓Prioritize sleep

✓Stay hydrated

✓Balanced nutrition

✓Limit early screen time

✓Reduce overstimulation

✓Light movement

✓Track your symptoms

✓Stress reduction

Track your recovery as you go.

The free ConcussionCare+ Recovery App turns this science into practice — clinical-style cognitive tools and symptom tracking, no account required.

Try the free app How ConcussionCare+ works

Reference

Helpful terms

Neuroplasticity: The brain’s ability to adapt and form new connections.
Mitochondria: Structures inside cells that generate energy.
Oxidative stress: An imbalance between free radicals and antioxidants.
Neurotransmitters: Chemicals brain cells use to communicate.
Cognitive load: The mental effort required to process information.
Neurometabolic cascade: The time-ordered chain of cellular changes a concussion sets in motion — from the impact through the energy crisis to recovery. See it interactively →

This page is for educational purposes only and is not a substitute for professional medical care. If you are experiencing severe, sudden, or worsening symptoms, seek emergency medical attention. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Take this with you

The full recovery guide, free.

Everything on this page and more — the cascade, the timeline, sleep, nutrition, and return-to-activity — in one plain-language guide.

The Concussion Recovery Guide

Evidence-informed, written by a clinical pharmacist. Straight to your inbox.

Recovery science, no spam. Unsubscribe anytime.

When you're ready

ConcussionCare+ is the multi-pathway formula built around the science on this page.

See the formula →