Headache After a Car Accident: When to Worry and What to Do
Plenty of people walk away from a crash with no headache at all, then develop one hours or days later. Others feel it immediately.
A headache after a car accident is a symptom, not a diagnosis. It can come from a strained neck, a concussion, or, less commonly, bleeding inside the skull. Sorting out which one you are dealing with is a medical question first and a legal question second, in that order.
What Causes Headaches After a Crash?
The most common causes are:
- Whiplash and neck strain. The same snapping motion that injures the neck produces cervicogenic headaches, which start in the neck and are felt in the head. They often arrive with neck stiffness and pain between the shoulder blades.
- Concussion. Your brain can be injured when your head strikes something, or from the violent acceleration and deceleration of the crash alone, with no direct blow at all. Headache is the most common concussion symptom.
- Muscle tension and stress. Guarding sore muscles, poor sleep, and the stress of the crash itself can produce or worsen headaches in the days after.
- Skull or brain bleeding. The least common and most dangerous cause. Bleeding can develop slowly, which is one reason a worsening headache in the first days after a crash should never be ignored, especially for older adults and anyone taking blood thinners.
Related: Whiplash Symptoms After a Car Accident
Symptoms That Can Come With the Headache
A post-crash headache deserves more attention when it arrives with company:
- dizziness or balance problems
- nausea or vomiting
- sensitivity to light or noise
- trouble concentrating, or feeling mentally foggy
- blurred or double vision
- ringing in the ears
- unusual fatigue, irritability, or mood changes
- memory gaps about the crash
That cluster points toward a concussion or traumatic brain injury rather than simple soreness, and it should be evaluated promptly and documented carefully.
Warning Signs That Need Emergency Care
Go to the emergency room, or call 911, if you develop:
- the worst headache of your life, or one that keeps getting worse
- repeated vomiting
- weakness, numbness, or clumsiness in an arm or leg
- slurred speech or trouble understanding speech
- confusion, unusual behavior, or inability to wake up
- a seizure
- unequal pupil sizes, or clear fluid draining from the nose or ears
- a headache that worsens significantly in the 24 to 72 hours after the crash
These can signal bleeding or swelling that needs immediate treatment. Do not drive yourself.
How Post-Accident Headaches Are Diagnosed
Evaluation usually starts with a history of the crash and your symptoms, a neurological exam, and examination of your neck. Imaging, such as a CT scan or MRI, is ordered when the presentation calls for it, particularly with any warning signs above.
Two practical points. First, a normal first scan does not rule out a concussion, which is diagnosed clinically, not by imaging alone. Second, tell every provider the headache began with the accident, and describe the timeline honestly. "Started the next morning and has not let up" is useful information, medically and legally.
Treatment and Recovery
Treatment depends on the cause: rest and gradual return to activity for concussions, medication as directed, physical therapy for neck-driven headaches, and follow-up monitoring when symptoms persist. Most post-accident headaches resolve over days to weeks. Some develop into persistent post-traumatic headaches that last months and need a specialist's care.
What matters most is follow-through. If the headache is still there at your follow-up, say so, even if it feels minor that day. Symptoms that are reported consistently get treated, and get documented.
Why Documentation Matters for a Headache Claim
Head injuries are among the most disputed claims in personal injury cases, because the injury is invisible and insurers argue the headache is stress, a pre-existing migraine, or unrelated. The records are the answer: an early evaluation that ties the headache to the crash, a consistent symptom history across visits, and any specialist findings.
Waiting a month to mention a headache for the first time hands the insurer its best argument. Getting checked early protects your health and your claim at the same time.
Related: What to Do After a Car Accident in Las Vegas: 10 Steps That Can Protect Your Claim
Head Still Hurting After a Las Vegas Crash?
If a headache started after your accident and is not going away, get it evaluated, and then talk to Attorney Ryan Alexander and his team about what the records show and what your options are.
Free Case Evaluation (702) 333-8888
This article provides general information and does not constitute legal or medical advice. Every accident is different, and different claims may involve different deadlines, insurance policies, and legal issues. Seek medical care promptly for any symptoms after a crash.
