Concussion headaches are the most common symptom after a head injury, and they respond best to a combination of rest, careful pain management, and gradual return to activity. Most resolve within a few weeks, though the right approach depends on what type of headache you’re experiencing and how long it’s been since your injury.
Why Concussions Cause Headaches
A concussion triggers a cascade of changes inside the brain: shifts in how cells process energy, widespread inflammation, and activation of the pain-signaling network that runs through your face, head, and upper neck. Your brain’s built-in pain-filtering system also becomes impaired, meaning signals that would normally get dampened instead pass through at full intensity. This is why light, noise, and even mild physical effort can make a concussion headache flare.
Not all concussion headaches feel the same. They tend to fall into a few distinct patterns. Some feel like a tight band of pressure around the head, similar to a tension headache. Others are throbbing and one-sided, with nausea and sensitivity to light or sound, closely resembling a migraine. A third common type originates from the neck, especially if the injury involved whiplash or a jolt that strained the upper spine. Knowing which pattern yours follows helps you target the right relief strategies.
Safe Pain Relief in the First Days
In the early days after a concussion, acetaminophen (Tylenol) is the recommended pain reliever. Ibuprofen, aspirin, and other anti-inflammatory drugs can increase the risk of bleeding and are generally avoided until a healthcare provider clears you. Stick with acetaminophen at the dose listed on the package.
One important caution: using any simple pain reliever on 15 or more days per month can cause medication overuse headache, a rebound cycle where the treatment itself starts generating headaches. If you find yourself reaching for acetaminophen daily for more than a couple of weeks, that’s a sign your headaches need a different management approach rather than more of the same medication.
Sleep Is More Than Rest
Sleep quality has a surprisingly strong connection to concussion headache severity. Research on concussion patients found that three specific sleep problems, drowsiness during the day, trouble falling asleep, and sleeping more than usual, together predicted over half of the variation in headache severity scores. In other words, poor sleep doesn’t just coexist with bad headaches. It actively drives them.
Practical steps that help: go to bed and wake up at the same time every day, even on weekends. Keep your room cool and dark. Avoid screens for at least 30 minutes before bed, since the blue light they emit is particularly irritating to a concussed brain. If you’re drowsy during the day, short naps (under 30 minutes) are fine, but long daytime sleeping can wreck your nighttime rhythm and worsen the cycle.
Hydration and Nutrition
Dehydration makes any headache worse, and a recovering brain needs more fluid support than usual. Aim for at least 80 ounces of water per day, and include a low-sugar electrolyte beverage rather than plain water alone. Start hydrating first thing in the morning and spread it throughout the day. Fruits, vegetables, and broths count toward your fluid intake. Avoid drinks with artificial sweeteners, which can be counterproductive during recovery.
Some nutrients show specific promise for post-concussion headaches. Magnesium (400 mg daily) and riboflavin, also known as vitamin B2 (400 mg daily), are currently being studied together as a treatment for post-concussion headache. Both have established track records in migraine prevention, and their safety profiles make them reasonable options to discuss with your provider if your headaches have a migraine-like quality.
Managing Light Sensitivity
If light makes your headaches worse, you’re not imagining it. Blue-green wavelengths, the kind produced heavily by fluorescent lights, computer screens, and daylight, are the most irritating to a concussed brain. Specialized rose-tinted glasses called FL-41 lenses filter out light at the specific wavelength (480 nm) that triggers the most discomfort. In studies, about 85% of patients with concussion-related light sensitivity reported improvement after using tinted lenses, and FL-41 lenses reduced migraine frequency in over 50% of children tested.
While you recover, you can also reduce exposure by dimming overhead lights, using warm-toned bulbs instead of cool-white LEDs, and enabling the blue light filter on your phone and computer. Avoid the temptation to sit in a completely dark room for days on end, though. Some light exposure is necessary for your circadian rhythm, and prolonged darkness can delay recovery.
Gradual Exercise as Treatment
The old advice to sit in a dark room until all symptoms disappear has been replaced by a more active approach. Controlled aerobic exercise, done below the level that triggers symptoms, actually speeds recovery. The method used in clinical research involves finding your symptom threshold heart rate (the point where headache or other symptoms start to increase), then exercising at about 80% of that heart rate for 20 minutes a day.
In practice, this might mean walking briskly, light jogging, or using a stationary bike while wearing a heart rate monitor. If symptoms flare up during the session, you stop for the day and try again tomorrow. Each week, you can retest your threshold and adjust upward. This progressive approach helps restore normal blood flow regulation in the brain, which is one of the systems disrupted by concussion.
Physical Therapy for Neck-Related Headaches
When your headache starts at the base of the skull or the back of the neck and radiates forward, it may be cervicogenic, meaning it originates from the neck rather than the brain itself. This is common when the same impact that caused the concussion also strained the muscles and joints of the upper spine.
Physical therapy and manual therapy techniques have shown effectiveness for this type of headache. Treatments typically include hands-on mobilization of the upper cervical spine, trigger point therapy for tight muscles in the neck and shoulders, coordination exercises, and a home exercise program targeting the muscles between the neck and shoulder blades. Soft tissue massage, stretching, and modifications to daily activities (like adjusting your workstation or sleeping position) also help. If your headache consistently worsens when you turn your head or hold certain postures, a cervicogenic component is likely, and targeted physical therapy can address the source directly.
When Headaches Signal Something Serious
Most concussion headaches are uncomfortable but not dangerous. However, certain patterns after a head injury require emergency care. Go to the emergency department if you experience any of the following:
- A headache that keeps getting worse and does not improve with rest or acetaminophen
- Repeated vomiting or persistent nausea
- Seizures or convulsions
- One pupil larger than the other or new double vision
- Increasing confusion, agitation, or inability to recognize people or places
- Slurred speech, weakness, numbness, or worsening coordination
- Excessive drowsiness or inability to stay awake
These can indicate bleeding or swelling in the brain, which requires immediate imaging and treatment. A headache that steadily worsens over hours, rather than coming and going, is the single most important red flag to watch for.
What a Typical Recovery Looks Like
Most people see their concussion headaches improve significantly within two to four weeks. During that window, headaches often shift from constant to intermittent, and triggers that were overwhelming early on (screens, noise, physical effort) gradually become tolerable again. Recovery isn’t always linear. You may have a good day followed by a rough one, especially if you overdo it.
When headaches persist beyond three months, they’re classified as persistent post-traumatic headache. At that point, treatment shifts toward the strategies used for whatever headache type yours most resembles, whether that’s migraine-specific approaches, physical therapy for cervicogenic pain, or a broader rehabilitation program. People with a history of migraine before their injury and those with significant sleep disturbance tend to have longer recovery timelines, making early attention to sleep and gradual activity especially important.