If you or someone near you has a concussion, the first priority is ruling out a more serious brain injury, then shifting into a brief period of relative rest before gradually returning to normal life. Most adults recover within two weeks, and most children feel better within two to four weeks. The steps you take in the first 48 hours and the following weeks can meaningfully affect how quickly you heal.
Know the Danger Signs First
Most concussions don’t require emergency care, but a small number of head injuries involve bleeding or swelling in the brain that needs immediate treatment. Call 911 or go to an emergency department if you notice any of these after a bump, blow, or jolt to the head:
- Seizures or convulsions
- Repeated vomiting
- One pupil larger than the other, or double vision
- Slurred speech, weakness, numbness, or loss of coordination
- A headache that keeps getting worse and won’t go away
- Increasing confusion, restlessness, or inability to recognize people or places
- Loss of consciousness, extreme drowsiness, or inability to wake up
For infants and toddlers, all of the above apply, plus inconsolable crying or refusal to nurse or eat. If none of these danger signs are present, you still want to see a healthcare provider, but you’re unlikely to need the ER.
What Happens Inside Your Brain
A concussion isn’t a bruise on the brain. It’s a chemical disruption. The impact causes brain cells to release a flood of charged particles that throw off their normal electrical balance. Restoring that balance requires a surge of energy, but blood flow to the brain drops by as much as 50% in the aftermath. Your brain is essentially trying to run a marathon on an empty stomach.
This mismatch between energy demand and energy supply is why you feel foggy, slow, and exhausted. It also explains why your brain is temporarily more vulnerable to a second injury. Until that chemical balance is restored and normal blood flow returns, pushing through symptoms can set back recovery or, in rare cases, cause serious harm.
The First 48 Hours
The current expert consensus, updated at the 2022 Amsterdam International Conference on Concussion in Sport, is clear: strict rest until all symptoms disappear is not beneficial. Instead, take 24 to 48 hours of relative rest. That means going about basic daily activities at a reduced pace, not lying in a dark room doing nothing.
During this window, you can walk and do other light physical activity as long as it doesn’t noticeably worsen your symptoms. Reduce screen time for the first 48 hours. Blue light from phones, computers, and TVs can aggravate light sensitivity, a common concussion symptom. If you do use screens, match the brightness to the room around you, hold devices at a comfortable distance, and take frequent breaks.
Sleep is not only safe but essential. The old advice about waking someone every few hours has largely been set aside. Rest is a critical part of early recovery. The one exception: if a person becomes difficult to wake up, that’s a danger sign requiring emergency care.
Managing Headaches Early On
Acetaminophen is the go-to pain reliever for concussion headaches. Avoid ibuprofen and other anti-inflammatory pain relievers for the first 48 hours because they thin the blood slightly, which could worsen any undetected bleeding in the brain. After that initial two-day window, either acetaminophen or ibuprofen is generally fine.
The Active Recovery Phase
After the first two days, begin adding activities back gradually. This doesn’t mean jumping back to your full routine. It means testing your tolerance. Try 20 minutes of reading. If that feels okay, try 30. If a headache flares, pull back and try again later. The goal is to stay just below the threshold where symptoms get worse.
Light aerobic exercise, like a 10-minute walk or easy spin on a stationary bike, can actually help recovery if it doesn’t significantly increase your symptoms. You don’t need to wait until you’re completely symptom-free to start moving, but you do need to listen to what your body is telling you.
Avoid alcohol during recovery. It affects the same brain processes that are already disrupted and can mask symptoms you need to be tracking.
Returning to School
Children and teens recovering from a concussion often need temporary changes at school. The CDC recommends creating a concussion management plan with the school that includes a single point of contact (a case manager) who coordinates with all of the student’s teachers.
Useful accommodations depend on which symptoms are most prominent:
- Thinking and memory problems: Reduced homework load, extra time on tests (limited to one per day), class notes provided in advance, and grades based on adjusted work rather than the full original workload.
- Headaches and light or noise sensitivity: Rest breaks, permission to wear sunglasses indoors, seating away from windows, a quiet space for tests or lunch, and extra time to move between classes to avoid crowded hallways.
- Mood and emotional changes: Access to a trusted adult for check-ins, a quiet place to go when feeling overwhelmed, and encouragement to stay connected with friends.
These accommodations are meant to be temporary. As symptoms improve, the school gradually removes them. Most children feel better within two to four weeks, though some take longer.
Returning to Sports
Athletes follow a six-step progression, and each step takes a minimum of 24 hours. If symptoms return at any step, you drop back to the previous one and try again after resting.
- Step 1: Return to regular daily activities like school or work, with clearance from a healthcare provider to begin the progression.
- Step 2: Light aerobic activity only, like 5 to 10 minutes of walking, light jogging, or easy cycling. No weight lifting.
- Step 3: Moderate activity that increases heart rate with body and head movement. Moderate jogging, brief running, moderate-intensity weightlifting with reduced weight or time.
- Step 4: Heavy non-contact activity. Sprinting, high-intensity cycling, full weightlifting routine, and sport-specific drills with no contact.
- Step 5: Full practice including contact, in a controlled setting.
- Step 6: Return to competition.
At minimum, this progression takes about a week from start to finish. Rushing it is genuinely dangerous.
Why a Second Hit Is So Risky
Second impact syndrome occurs when someone sustains another head injury before the first concussion has fully healed. The brain, still in its vulnerable energy-depleted state, can respond with rapid, catastrophic swelling. Blood vessels in the brain become severely congested, pressure builds inside the skull, and the result can be permanent brain damage or death. This is rare, but it’s the primary reason every return-to-play protocol exists. No game or practice is worth the risk of playing through unresolved symptoms.
When Symptoms Don’t Go Away
Most people recover fully. But for some, symptoms like headaches, dizziness, difficulty concentrating, irritability, and sleep problems persist for months. This is sometimes called post-concussion syndrome, though there’s no single agreed-upon definition. Some providers use the term when symptoms last beyond three months; others wait six months or longer.
There’s no test that can confirm post-concussion syndrome directly. It’s a clinical judgment based on your symptoms and history. If you’re still struggling weeks after your injury, a provider experienced with concussion can help guide a more targeted recovery plan that may include specific types of exercise therapy, vision therapy, or vestibular rehabilitation depending on which symptoms are dominant. Persistent symptoms don’t mean permanent damage. They mean your brain needs a more individualized approach to finish healing.