Acetaminophen (Tylenol) is the safest first choice for concussion headache pain, but medication alone rarely solves the problem. The most effective approach combines short-term pain relief with hydration, controlled rest, gentle aerobic exercise, and in some cases physical therapy targeting the neck. Most concussion headaches resolve within a few weeks, though about 10 to 15 percent of people develop persistent symptoms lasting three months or longer.
Why Concussions Cause Headaches
A concussion disrupts normal brain function at the cellular level, triggering inflammation and changes in blood flow regulation. These changes overlap heavily with the mechanisms behind migraines, which is why post-concussion headaches often feel like migraines: throbbing pain, sensitivity to light and noise, and nausea. The injury can also strain the upper neck, and dysfunction in the top cervical vertebrae is a well-established source of headaches on its own. So what you’re dealing with may be brain-driven, neck-driven, or both at once.
Pain Relievers: What’s Safe and What’s Not
Acetaminophen is the recommended over-the-counter option after a concussion. Ibuprofen (Advil, Motrin) and aspirin should be avoided, especially in the early days, because they thin the blood and may increase the risk of bleeding inside the skull.
There’s an important catch with any pain reliever, though. Using it more than a couple of days per week can lead to medication overuse headaches, sometimes called rebound headaches. Taking simple painkillers 15 or more days a month, or combination painkillers 10 or more days a month, for three months or longer significantly raises this risk. If you find yourself reaching for acetaminophen daily, that’s a signal to explore other strategies rather than continuing to medicate.
Rest the Right Way in the First 48 Hours
Limiting screen time and mentally demanding tasks for the first one to two days after injury helps reduce headache intensity. But “rest” doesn’t mean lying in a dark room for days. The CDC specifically advises against isolating yourself (or your child) in darkness or cutting off social contact. Brief periods of quiet rest are fine. Total sensory deprivation can actually slow recovery and worsen mood, which feeds into the headache cycle.
After those initial couple of days, you can gradually reintroduce normal activities. If something makes your headache noticeably worse, scale back, but don’t avoid it entirely the next day. The goal is a steady return to your routine, not prolonged withdrawal from it.
Aerobic Exercise as Treatment
This surprises many people, but controlled aerobic exercise is one of the most effective tools for concussion headaches, particularly when symptoms linger beyond the first week or two. The key word is “sub-symptom threshold,” meaning you exercise at an intensity just below the point where your headache gets worse.
If you have access to a clinician who can do formal exercise tolerance testing (like the Buffalo Concussion Treadmill Test), they’ll identify the heart rate where your symptoms flare and prescribe exercise at 80 to 90 percent of that level for at least 20 minutes a day. You return every one to two weeks for reassessment and a new target.
If formal testing isn’t available, you can start more conservatively. Calculate your estimated maximum heart rate (220 minus your age), then begin exercising at 50 percent of that number while wearing a heart rate monitor. If you tolerate that without worsening symptoms, increase by 5 to 10 beats per minute the following day. If symptoms flare at a certain intensity, stay below that level until you can handle more. Stationary biking is the best starting point because it’s safe and keeps your head relatively still. Avoid resistance exercises like rowing or weight lifting early on, as they cause larger swings in blood pressure that the recovering brain doesn’t tolerate well.
Research in adolescents and adults with symptoms lasting six weeks or longer found that this type of individualized aerobic exercise program safely shortened recovery compared to simply resting.
Physical Therapy for the Neck
The force that causes a concussion almost always jolts the neck, too. Upper cervical joint dysfunction is a recognized cause of what’s called cervicogenic headache, and it frequently coexists with the brain-related headache after a concussion. If your headache concentrates at the base of your skull or is accompanied by neck stiffness, neck-focused treatment is worth pursuing.
A 2014 study found that people with persistent post-concussion symptoms who received cervical spine and vestibular rehabilitation were cleared to return to sport within eight weeks at significantly higher rates than a control group. The most effective physical therapy approaches combine manual therapy (hands-on joint mobilization of the neck), postural retraining, stretching, and targeted exercise. Spinal manual therapy combined with sensorimotor training has outperformed rest-plus-exercise programs for concussion recovery overall.
Hydration Makes a Bigger Difference Than You’d Think
Dehydration alone produces many of the same symptoms as a concussion: headache, dizziness, brain fog, difficulty concentrating, and fatigue. In a controlled study, 50 percent of participants reported headaches when dehydrated, and dehydration significantly worsened overall symptom severity scores compared to a well-hydrated state. When you’re recovering from a concussion and already experiencing these symptoms, even mild dehydration stacks on top and amplifies your discomfort.
There’s no magic number for ounces per day, but staying consistently hydrated throughout the day, rather than catching up with large amounts at once, tends to work best. If your urine is pale yellow, you’re in a good range.
Supplements That May Help Persistent Headaches
If headaches persist beyond two weeks, two supplements have enough evidence to be worth trying. The American Headache Society’s recommendations for post-concussion headache in youth include magnesium (400 to 500 mg taken at night) and riboflavin, also known as vitamin B2 (400 mg daily). Both are borrowed from migraine prevention research, which makes sense given how closely post-concussion headaches resemble migraines. Give either supplement six to eight weeks before deciding whether it’s helping. One small trial found that 400 mg of magnesium combined with acetaminophen, started within 48 hours of injury, improved outcomes compared to acetaminophen alone.
Red Flags That Need Emergency Care
Most concussion headaches are uncomfortable but not dangerous. However, certain patterns signal a more serious brain injury. Go to the emergency room if you experience a headache that steadily worsens rather than fluctuates, repeated vomiting, slurred speech, numbness or weakness in your arms or legs, confusion about where you are or who people are, loss of consciousness, or inability to be woken from sleep. These symptoms can appear hours or even a day or two after the initial injury, so stay alert even if you felt fine at first.
What Recovery Looks Like
Most concussion headaches appear within 7 to 10 days of the injury and resolve within a few weeks. When they don’t, the condition is classified as persistent post-concussive symptoms, generally defined as lasting longer than three months. In some cases, symptoms can continue for a year or more. The longer headaches persist, the more important it becomes to layer strategies: aerobic exercise, neck-focused physical therapy, hydration, and possibly magnesium or riboflavin, rather than relying on pain medication alone.