A headache seems like the least alarming thing that could happen after a car accident. No blood, no broken bones — just a dull ache that you assume will pass with some ibuprofen and a good night’s sleep.
Sometimes that’s true. But a headache after a crash can also be your body’s first signal of something more serious — from cervical spine injury to concussion — and knowing the difference matters.
At Clínica Real, headaches are one of the most common complaints we hear across our Phoenix, Maryvale, Glendale, and Mesa clinics, often showing up alongside neck pain, dizziness, or “fogginess” that patients can’t quite explain. Here’s what’s actually going on, and when it’s time to get checked.
Why Car Accidents Cause Headaches
A collision doesn’t just jolt your neck — it jolts everything connected to it, including the base of your skull, upper spine, and surrounding nerves and muscles. Most post-accident headaches fall into a few categories:
Cervicogenic headaches — These originate in the neck, not the head itself. Misalignment or muscle tension in the cervical spine irritates nerves that refer pain upward, often felt at the base of the skull or behind one eye.
Tension headaches — Caused by muscle strain and stress in the neck, shoulders, and jaw following the impact. These tend to build gradually over hours or days.
Post-concussion headaches — If your head made contact with the steering wheel, window, or headrest — or even if it didn’t, but the brain moved sharply inside the skull — headaches can be a symptom of concussion or mild traumatic brain injury (mTBI).
Because these three types can feel similar in the early days, a proper evaluation is the only reliable way to know which one you’re dealing with.
Timeline: When Do Post-Accident Headaches Show Up?
Similar to whiplash, headaches don’t always appear right away. Adrenaline can delay symptoms for the first day or two. Most patients notice headaches starting within 24–72 hours, often worsening over the following week if the underlying cause — usually cervical misalignment or muscle tension — isn’t addressed.
Left untreated, what starts as an occasional headache can become a recurring pattern that lasts weeks or months, especially if the root cause is in the neck rather than the head.
Red Flags: When a Headache Needs Immediate Medical Attention
Most post-accident headaches are manageable with chiropractic and conservative care. But certain symptoms mean you should seek emergency care right away, not a scheduled appointment:
- Headache that gets progressively worse rather than better
- Loss of consciousness at any point after the accident
- Repeated vomiting
- Slurred speech or confusion
- Vision changes (blurry, double, or loss of vision)
- Weakness or numbness on one side of the body
- Seizures
- A headache that wakes you up from sleep or feels like “the worst headache of your life”
If any of these apply, go to an emergency room immediately. For everything else — the dull, persistent, tension-and-neck-related headaches most patients experience — chiropractic evaluation is an appropriate and effective next step.
Not sure which category your headache falls into? That’s exactly what an evaluation is for. Call (602) 222-9595 — same-day appointments available at all 4 AZ locations.
How Chiropractic Care Treats Post-Accident Headaches
When a headache is coming from the neck — which is the case far more often than people expect — chiropractic care addresses the actual mechanical cause instead of just masking the pain with medication.
Treatment typically includes:
- Cervical spine adjustments to correct misalignment placing pressure on nerves
- Soft tissue therapy to release tension in the neck, shoulders, and upper back
- Trigger point work targeting muscle knots that commonly refer pain into the head
- Postural correction exercises to reduce strain that can trigger recurring headaches
- Symptom tracking at each visit to monitor whether headaches are improving, which also helps document your recovery for insurance or legal purposes
Most patients notice a meaningful reduction in headache frequency and intensity within the first few weeks of consistent care.
Why Getting Checked Early Matters — Even for “Just a Headache”
Two reasons. First, medically: the earlier a cervicogenic or tension headache is treated, the less likely it becomes chronic. Second, practically: if you’re working with a personal injury attorney, a documented headache from day one connects your symptoms clearly to the accident. Waiting weeks to mention it makes that connection harder to prove.
Frequently Asked Questions
Is it normal to get a headache days after a car accident? Yes. Delayed-onset headaches are common due to inflammation and adrenaline masking symptoms initially. If a headache appears within the first couple weeks after an accident, it should still be evaluated as accident-related.
Can neck injuries cause headaches? Yes — this is one of the most common causes of post-accident headaches. Misalignment or muscle tension in the cervical spine can refer pain directly into the head, especially at the base of the skull.
Should I see a doctor or a chiropractor for headaches after an accident? If you have any red-flag symptoms (listed above), go to the ER first. For typical tension or neck-related headaches, a chiropractic evaluation is an effective first step and can also refer you for further imaging or specialist care if needed.
Will treatment for headaches cost me anything out of pocket? No. Clínica Real treats auto accident patients on a lien basis — care starts immediately, and billing is handled through your claim. If you don’t have an attorney yet, we can connect you with one from our trusted network at no extra cost.
Don’t Brush Off the Headache
A headache after a car accident is easy to dismiss — until it isn’t. Whether it’s tension building in your neck or something that needs urgent attention, the only way to know is to get checked.
Clínica Real — Del Pueblo, Para el Pueblo. Same-day appointments. No out-of-pocket cost. Bilingual care at four locations across the Valley: Phoenix, Maryvale, Glendale, and Mesa.
