Post-traumatic headaches are one of the most common symptoms following a car accident and one of the most legally complicated to pursue in a personal injury claim. They are common in the general population independent of trauma, making the causation argument vulnerable to the defense assertion that the headaches predate the crash or are unrelated to it.

They are invisible, meaning they do not produce objective physical findings that an examining physician can measure. And they can be caused by multiple overlapping mechanisms from the same crash, including traumatic brain injury, cervical spine injury, and psychological trauma, each of which has its own medical and legal significance.

The Most Clinically Significant Post-Crash Headache Mechanism

Post-traumatic headaches that arise from traumatic brain injury are the most clinically significant category because they signal underlying neurological injury that may be producing cognitive, emotional, and functional effects beyond the headache itself.

A crash victim who develops persistent headaches after a crash, particularly when accompanied by cognitive slowing, difficulty concentrating, memory problems, sleep disturbance, or emotional lability, should be evaluated by a neurologist for post-concussive syndrome regardless of whether the initial emergency CT scan was normal. Standard CT imaging has limited sensitivity for the diffuse axonal injury that produces post-concussive symptoms.

Cervicogenic Headaches and Their Relationship to Neck Injury

Cervicogenic headaches arise from injury to the upper cervical spine structures and produce characteristic pain patterns that radiate from the neck into the head.

These headaches are causally linked to the cervical injury rather than to brain trauma and are treated through cervical spine management rather than neurology. Distinguishing cervicogenic from post-traumatic brain injury headaches requires specialist evaluation and affects both the treatment plan and the legal damages characterization.

Building the Causal Record From Day One

The most important step in protecting a post-crash headache claim is documenting the onset of headaches in the medical record from the first post-crash encounter. A medical record that first mentions headaches three weeks after the crash is more vulnerable to the defense’s pre-existing condition argument than one that documents headache onset immediately after the collision.

The National Institute of Neurological Disorders and Stroke’s headache resources describe the clinical framework for post-traumatic headaches. Working with an experienced headache after car accident, an attorney ensures that the medical documentation strategy supports both the causation argument and the full damages