What Causes Migraines? Physiological Root Causes and Natural Approaches

Traumatic Brain Injury (TBI)

One of the most common and most underrecognized causes of migraines. Head trauma doesn’t have to be severe or dramatic. Minor bumps, falls, sports injuries, and whiplash injuries can accumulate over years and alter neurological function in ways that manifest as migraines later in life.

The mechanism involves disruption to the brain’s electrical self-regulation — its ability to maintain stable, appropriate firing patterns. LENS Neurofeedback is the most direct clinical tool I use for this presentation. It works at the level of the electrical dysregulation rather than suppressing symptoms.

LENS Neurofeedback for TBI-related migraines

Female Hormonal Imbalances

Many women experience migraines that follow their menstrual cycle — typically appearing just before or at the onset of menses. While this can be a hormonal cause in itself, it usually involves a liver component. Estrogen must be cleared by the liver, and when liver function is impaired, hormonal fluctuations become more pronounced and more provocative.

Treatment addresses hormonal regulation first — ensuring cycle regularity — and then often involves liver support to improve hormone clearance. Copper imbalance is frequently found alongside hormonal migraines in women and should be evaluated when this pattern is present.

Copper imbalance and hormonal migraine

Liver Imbalance

The liver clears toxins, metabolizes hormones, and produces the proteins that regulate multiple physiological processes. When liver cells aren’t functioning optimally — not producing the right proteins for their job — the downstream effects can include migraines, sensitivity to rich foods and alcohol, and hormonal instability.

I describe this to patients as the liver cells forgetting how to do their job. Our DNA is more of a blueprint than a fixed instruction set — the body has flexibility in what it produces. Naturopathic treatment uses gemmotherapy, homeopathy, and low-dose botanicals to assist liver function and support epigenetic reset of liver cell activity.

Naturopathic care for liver-related migraine

Gastrointestinal Dysfunction

The gut-brain connection in migraines is well-established clinically, though the mechanism is incompletely understood. The most common gastrointestinal drivers include leaky gut (increased intestinal permeability), SIBO (Small Intestinal Bacterial Overgrowth), and disrupted gut flora. When the gut lining becomes compromised, undigested food particles and bacterial byproducts enter the bloodstream, triggering systemic inflammatory responses that can manifest as migraines.

The GI cause is distinct from the liver cause — both can be present. Proper diagnosis of the GI component begins with an elimination diet. If that doesn’t fully resolve the presentation, testing for SIBO, leaky gut, IBS, or Crohn’s follows. Treatment varies significantly based on what’s found.

Adrenal and Thyroid Dysfunction

The adrenal glands and thyroid are both involved in migraine pathophysiology through separate but related pathways. Adrenal dysfunction can cause rapid changes in cortisol and epinephrine — the adrenal glands also direct the liver to produce certain proteins, meaning adrenal dysfunction can look like a liver problem without actually being one. Thyroid imbalance, in either direction, disrupts sleep and energy regulation. Fatigue is one of the most reliable migraine triggers, and thyroid-driven fatigue creates a persistent vulnerability.

Copper and Zinc Imbalance

This is a newer area of clinical focus for me — though the research goes back thirty years. Americans are broadly low in zinc and higher in copper, likely related to food processing and environmental factors, though the exact mechanism isn’t fully established.

High free copper is a powerful pro-inflammatory agent that can drive the vascular and neurological inflammation associated with migraines. It also correlates strongly with hormonal sensitivity — explaining why many women with copper imbalance develop migraines linked to their cycle. Research has shown zinc supplementation to be a promising intervention for migraines. (Dillon, Singh, Lvall. Medical Hypotheses, 2011.)

I have seen migraines, Meniere’s disease, and fibromyalgia resolve over time with copper-zinc rebalancing. Simple testing of blood markers — serum copper, ceruloplasmin, and zinc — can determine whether this is a factor.

Copper and zinc imbalance — full clinical detail

Nervous System Dysregulation

Beyond TBI, the nervous system can become dysregulated through chronic stress, trauma, and accumulated physiological burden — producing a state of heightened reactivity in which migraine thresholds are chronically lowered. This is the “sensitive system” presentation: patients who seem to react to everything and whose migraines have multiple triggers with no consistent pattern.

LENS Neurofeedback is the most direct tool I use for nervous system dysregulation. By working at the level of the brain’s electrical patterns — delivering a low-energy electromagnetic signal based on the brain’s own feedback — it supports the system in self-regulating rather than remaining in a state of chronic hyperreactivity.

LENS Neurofeedback — available in Honolulu

Food Sensitivities and Histamine Intolerance

Distinct from GI dysfunction, food sensitivities can produce migraines through inflammatory and neurological pathways even in people without obvious digestive symptoms. Histamine intolerance — an inability to adequately break down dietary histamine — is particularly common in migraine patients. High-histamine foods (aged cheeses, fermented foods, alcohol, certain fish) become consistent triggers not because they are inherently harmful but because the body’s histamine clearance capacity is insufficient.

The primary mechanism is low diamine oxidase (DAO) activity. DAO is the enzyme responsible for breaking down histamine in the gut before it enters systemic circulation. When DAO activity is reduced — through genetic variants, gut inflammation, or nutritional cofactor deficiency — dietary histamine passes into the bloodstream and drives the vascular and neurological inflammation associated with migraines. Identifying and supporting DAO activity is often more clinically productive than trigger avoidance alone.

Sleep and Circadian Disruption

Sleep is when the glymphatic system clears metabolic waste from the brain — including inflammatory byproducts that accumulate during waking hours. Chronic sleep disruption, poor sleep architecture, or circadian misalignment maintains a state of neurological inflammation that significantly lowers migraine thresholds. Many patients in this category have tried everything for their migraines without realizing that sleep is the primary driver.

Sleep disruption in migraineurs often has a physiological root — adrenal dysfunction, thyroid imbalance, or copper overload can all drive sleep problems that in turn drive migraines. Addressing the sleep issue without finding its cause produces limited results. The Restoration Protocol addresses sleep architecture specifically as part of a broader nervous system recovery framework.

The Restoration Protocol — sleep and nervous system recovery