03/08Symptoms & Causes

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Chapter 03 · Symptoms, Triggers & Severity

Recognizing migraine symptoms.

How do I know if this is migraine — and which symptoms are never migraine's?

Migraine has the clearest diagnostic rulebook in the headache world (the ICHD-3 criteria, taught below): attacks lasting 4–72 hours, with at least two of four pain characteristics and at least one of two accompaniments — nausea or light-and-sound intolerance — repeating across at least five attacks. But this chapter carries two instructions that outrank the pattern: know the emergency headaches that mimic migraine (thunderclap, fever with stiff neck, new neurological deficits) and know the two clinical tripwires migraine lives with: aura plus estrogen contraception, and medication-overuse headache.

The four most common symptoms

§ 3.1

🤕

The Attack Pattern

4–72 hours of moderate-to-severe, often one-sided, throbbing pain — made worse by routine activity like climbing stairs. The ICHD-3 anchor.

Common

💡

Light & Sound Intolerance

Photophobia and phonophobia — the need to retreat to a dark, quiet room — as diagnostic as the pain itself.

Common

🤢

Nausea (and Vomiting)

A brainstem symptom of the attack itself — the nausea can outlast the headache and often delays oral medication.

Common

👁️

Aura (in ~1 in 4)

Reversible visual zigzags, blind spots, tingling, or language disturbance developing over 5–20 minutes and resolving within an hour — preceding the pain.

Common

The Two Tripwires: Aura & Estrogen; Overuse & Transformation

The aura–estrogen rule: migraine with aura and estrogen-containing contraceptives (the pill, patch, ring) are a combination that raises stroke risk and is contraindicated — the aura signals a brain already prone to spreading vascular events, and exogenous estrogen stacks the coagulation side. This is not a scare statistic; it is a routing instruction: women with aura discuss contraception with their physician and are typically routed to progestin-only or non-hormonal methods. Migraine without aura carries a different, lower risk calculus — the distinction is clinical and matters.

The overuse transformation: the most important self-inflicted danger in migraine is treating too often. Triptans, opioids, or combination painkillers used on 10 or more days per month (or simple painkillers 15+) drive medication-overuse headache — the nervous system adapting to frequent interruption by raising its baseline pain level, converting episodic migraine into chronic daily headache. It is common, it is treatable, and it is almost entirely preventable by counting: the diary's medication column is not bureaucracy, it is the guardrail.

Why symptoms occur

§ 3.2

1 Trigeminal-CGRP activation begins at the meninges

2 Pain pathways sensitize — pulse becomes throbbing

3 Thalamic amplification opens light and sound channels

4 Brainstem nausea center engages

5 The full attack picture assembles. Treat early; count the days.

Migraine Frequency & Care Spectrum

§ 3.3

Episodic (Low-Frequency)

Fewer than 8 headache days/month
Attacks respond to acute treatment
Lifestyle + diary as foundation
Prevention if attacks are disabling

High-Frequency Episodic

8–14 headache days/month
Prevention clearly indicated
Medication-day counting critical
The transformation warning zone

Chronic Migraine

15+ headache days/month for 3+ months
Check for medication overuse first
Specialist care; CGRP mAbs, onabotulinumtoxinA
Reversal is possible — the earlier the better

Interactive Trigger Explorer

§ 3.4

Select a trigger

Select a trigger above

↓

The trigger tips the hyperexcitable brain past its threshold

↓

The four-phase attack begins → map your pattern in the diary; count your medication days.

Understanding Your Personal Risk Profile

Migraine risk factors cluster into four families — most of them modifiable in their timing if not their existence:

Genetic & demographic: strong heritability (a first-degree relative roughly doubles risk), female sex (3:1, hormonal), peak prevalence in the productive decades of 25–55.
Hormonal: menstrual-cycle estrogen withdrawal, perimenopausal fluctuation, hormonal contraception — the timing questions that shape the treatment conversation.
Behavioral: sleep irregularity, skipped meals, caffeine inconsistency, stress let-down — the schedule triggers, all of them manageable.
Medication load: frequent acute-medication use — the one risk factor that worsens the disease itself, and the most preventable.

🚨 MEDICAL EMERGENCY: The Headaches That Are Not Migraine 🚨

Call 911 or seek emergency care immediately if you experience:

⚠ A sudden, explosive 'worst headache of my life' reaching peak intensity within seconds to a minute — possible subarachnoid hemorrhage. This is never a routine migraine, even in migraineurs.

⚠ Headache with fever and stiff neck, or rash — possible meningitis: emergency evaluation.

⚠ First-time or changed aura with weakness, speech difficulty that persists, or confusion beyond typical aura — stroke must be excluded; atypical or prolonged aura (>60 minutes) and first aura after age 50 need urgent evaluation.

⚠ Headache with new vision loss, double vision, or pain behind the eye with redness — urgent ophthalmologic evaluation.

⚠ New headache in pregnancy, especially with swelling or high blood pressure — preeclampsia evaluation, urgently.

⚠ Any attack lasting beyond 72 hours (status migrainosus) or unresponsive to your usual treatment with vomiting preventing fluids — medical care, not endurance.

Chapter Complete

Next: Nutrition & Lifestyle

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