Symptoms and Triggers: Navigating the Migraine Journey

A migraine attack is often much longer than the period of head pain itself. Research shows that migraine without aura is a polyphasic (multi-phase) event, meaning it moves through a sequence of stages ^[1]. However, it is important to remember that not every patient has every phase, phases can overlap, and some attacks have no recognizable prodrome or postdrome at all.

The Four Phases of a Migraine Attack

While every person—and even every individual attack—is different, most migraine events follow a general timeline ^[2].

1. Prodrome (The Warning Phase): This phase can begin hours or even up to three days before the pain starts ^[1]. It is related to early activity in the hypothalamus, the part of the brain that regulates your body’s internal balance ^[1]. You may experience premonitory symptoms such as frequent yawning, neck stiffness, intense food cravings, increased thirst, or mood swings ^[3].
2. Aura (Absent in this diagnosis): Aura consists of temporary, fully reversible focal neurologic symptoms (such as seeing jagged lines, losing vision in one eye, or experiencing tingling/numbness) that evolve over minutes. In “migraine without aura,” this phase is absent. Note: pre-headache light or sound sensitivity is not aura; it is a prodrome or early headache symptom ^[4].
3. Headache (The Pain Phase): This phase typically lasts between 4 and 72 hours when untreated or unsuccessfully treated ^[5]. The pain is often described as pulsating or throbbing and is usually moderate to severe ^[6].
4. Postdrome (The “Migraine Hangover”): Once the pain stops, the attack is not necessarily over. Up to 70% of people experience a postdrome phase, most commonly marked by extreme fatigue, “brain fog,” and difficulty concentrating ^[7].

Beyond the Headache: Core Symptoms

For a diagnosis of migraine without aura, the head pain must be accompanied by other symptoms. These are not “side effects” of the pain but are central parts of the neurological event ^[1].

• Sensory Hypersensitivity: This includes photophobia (sensitivity to light) and phonophobia (sensitivity to sound) ^[6]. Many people also experience osmophobia (sensitivity to odors), which is often seen in migraine ^[8].
• Digestive Distress: Nausea is one of the most common and “bothersome” symptoms, occurring in the majority of attacks ^[9]. In some cases, this can lead to vomiting ^[6].
• Movement Aggravation: Unlike a tension headache, migraine pain typically gets worse with routine physical activity, such as walking or climbing stairs ^[6].
• Allodynia: You may find that things that should not be painful—like brushing your hair, wearing glasses, or the touch of a soft pillow—feel painful or uncomfortable during an attack. This is a sign that your central nervous system is over-sensitized ^[10].

The Science of Triggers

A “trigger” is anything that tips your brain over the migraine threshold and starts an attack ^[11]. It is helpful to think of your brain as a bucket: many small factors (lack of sleep, a skipped meal, a stressful day) fill the bucket, but only the last drop causes it to overflow into an attack ^[11][12]. Triggers are individual associations, rather than universal causes.

Common Associations

While triggers are highly individual, research frequently identifies several common culprits:

• Hormonal Shifts: For many women, the “perimenstrual window” (the days just before and during a period) is the most significant trigger time due to falling estrogen levels ^[13].
• Stress and “Letdown”: While high stress can trigger an attack, many people find they get a migraine right after the stress ends—known as the stress letdown effect (e.g., getting a migraine on the first day of a vacation) ^[12].
• Metabolic Changes: Fasting, skipping meals, or dehydration are well-documented triggers because they disrupt the brain’s energy supply ^[12].
• Sleep Disruption: Both getting too little sleep and getting “too much” sleep (like sleeping in on weekends) can trigger the hypothalamus and start an attack ^[14].

The “Trigger vs. Symptom” Confusion

One of the most important findings in recent migraine research is that many things people think are triggers are actually early symptoms of the attack ^[12]. For example:

• If you crave chocolate and then get a migraine, the craving was likely a prodrome symptom caused by the brain already starting the attack, rather than the chocolate causing the pain ^[15].
• If light or smells bother you before the pain starts, you were likely already in the early stages of a migraine ^[8].

Instead of strictly avoiding every possible food or scent in an extreme elimination diet, experts recommend keeping a prospective diary to identify your personal patterns and focusing on maintaining a consistent “migraine-friendly” routine ^[16][17].