Headaches & Chronic Migraine

What is the functional medicine approach to chronic headaches?

The functional medicine approach to chronic headaches starts with an accurate diagnosis built from the history, since there is no lab or scan for a headache. From there it treats each headache as a web of mechanisms rather than a single symptom. A migraine runs on vascular inflammation, neuroinflammation, and mitochondrial dysfunction, wound up by comorbidities. A tension-type headache runs on hydration, blood sugar, electrolytes, and sleep. The clinician finds the drivers that matter for that patient, addresses the highest-leverage one first, then tracks frequency, severity, and duration over time.

Why do chronic migraines keep coming back after the medication stops working?

Conventional migraine care is built to block a single inflammatory signal during an attack. It is not built to ask what keeps activating the attack in the first place. Functional medicine works the other end of the problem. It treats the migraine as a web of mechanisms that can be found, measured, and unwound one at a time.

How do you diagnose a headache without a lab or a scan?

There is no blood test and no imaging study that diagnoses a headache. Diagnosis comes from the history. Dr. Kharrazian teaches seven questions and five characteristics: where the pain sits, what it feels like, how much it disables the patient, how long it lasts, what triggers it, and any special features.

Those characteristics separate the common headaches cleanly. A migraine is unilateral, throbbing, disabling, with light and sound sensitivity and nausea. A tension-type headache is a bilateral band that eases when the muscles are pressed. A sinus headache sits over the sinuses. The special features matter most, and the course provides the charts to hold them.

Before any of that, the clinician screens for danger. The SNOOP criteria flag the secondary headaches that need imaging: systemic signs, neurological deficits, sudden onset, older age with a new pattern, and a progressive or positional course. These are rare in a functional medicine office, but they are the headaches you never want to manage yourself.

What actually drives a migraine?

A migraine begins in the trigeminal vascular system, a region of the brainstem that connects the nerves of the face and the blood vessels around the brain. Stress, poor sleep, hormone shifts, and inflammation all activate it. Once activated, it releases a neuropeptide called CGRP that inflames the meningeal blood vessels and fires the pain.

At the same time, inflammation and low oxygen shut down neuronal mitochondria. ATP drops, the sodium-potassium pump falters, and neurons drift close to their firing threshold. Now trivial input sets them off. That explains the light sensitivity, the sound sensitivity, and the aura. The brain is not just hurting. It is misfiring.

Why do chronic migraines keep winding up?

Dr. Kharrazian teaches the migraine as a web with two halves. The amplifiers are the vicious cycles inside the brain: vascular inflammation, microglial neuroinflammation, and mitochondrial dysfunction, each feeding back to the trigeminal vascular system. The activators are the comorbidities that push from outside: hormone dysregulation, insulin resistance, respiratory and sinus inflammation, gut inflammation, and general inflammatory load.

These variables stack as an allostatic load. A patient sits below their migraine threshold until enough drivers add up, and each driver is weighted differently. For one patient, estrogen fluctuation carries most of the weight. For another, it is insulin resistance, and magnesium barely moves the needle. The clinical work is deciding which variables matter for this patient and getting them below threshold.

That is why sequencing is the real skill. The course teaches you to read the history, start with whatever is most obvious, and work one pathway at a time. Fix everything at once and a patient may improve without telling you which lever did it.

Why are tension-type headaches so common, and so often missed?

Tension-type headaches are the most common headache in the world, and they share one mechanism with several others: a myofascial-based pathophysiology. The sheath around the muscles tightens, cuts off local blood flow, and fires the pain fibers. The same pattern drives cervical myofascial, TMJ, and cervicogenic headaches.

What sets a tension-type headache apart is that the trigger is metabolic, not mechanical. Dehydration, a blood sugar drop, an electrolyte imbalance, poor sleep, or an inflammatory meal pushes the muscles into contracture. When the headaches recur, the course gives a working checklist: hormones, micronutrients, blood sugar, hydration, sleep, movement, and sources of inflammation. Vitamin D runs through many of these cases, and it is a hormone, not a vitamin.

What about the headache no one can explain?

The strangest headaches are usually post-traumatic brain injury headaches, and they are the most overlooked in practice. A color, a sound, a crowded room, or a cognitive task sets them off. The reason is dysautonomia from an old injury, and the delay can be years.

A head injury primes the brain's microglia into a constant inflammatory state and leaves those neurons short on energy. When the injured region is stimulated, or when inflammation flares, the brain fatigues and the headache fires. Dr. Kharrazian teaches a staged model: find the stimulus that fatigues the brain, identify the inflammatory triggers, reduce neuroinflammation, support the mitochondria, and rebuild connectivity to the injured region. The Brain Region Localization Form helps place the injury before you treat it.

How do you know if treatment is working?

Because there is no objective test, the baseline is everything. Set frequency, severity, and duration with the patient, then compare against it. Validated tools make the subjective measurable: the MSQ and ID Migraine questionnaires for diagnosis, the MIDAS form for disability, and a tracking app for triggers and trends.

This matters because chronic headaches change the brain. Repeated pain builds central sensitization, and the pain pathways grow more efficient at hurting. Once that happens, the goal shifts to stopping the attacks from starting. Pharmacology still has a place, especially for acute migraine, where stopping the inflammatory cascade protects the brain. Functional medicine does the long work of unwinding what keeps the attacks coming.

For related reading, see Clinical Indicators a Patient is Too Systemically Fragile for Detox, Beyond Pharmaceuticals: Integrative Migraine Management, Metabolic Dysfunction as Hidden Driver of Chronic Migraines, and Neurovascular Coupling Dysfunction After Brain Injury.