Migraine is a debilitating neurological condition characterized by severe headaches, nausea, vomiting, and sensitivity to light or sound. Approximately five million Australians are affected by migraine, and understanding its four distinct phases can assist in symptom recognition and pain management.
Understanding the four distinct phases of a migraine attack is crucial for effective symptom recognition and pain management.
Phases of a Migraine Attack
Phase 1: Premonitory (Prodrome)
This initial warning period occurs 24 to 48 hours before a migraine attack fully manifests. It involves abnormal activation of the hypothalamus, the brain region regulating body temperature, appetite, mood, and sleep. Symptoms can include poor concentration, food cravings, irritability, and insomnia, offering an early opportunity for intervention.
Phase 2: Aura
Aura refers to neurological symptoms affecting vision, speech, or sensations. Visual auras, such as flashing lights, swirling shapes, or blind spots, are the most common. Sensory auras may cause numbness or tingling in the face or limbs, and in severe instances, speech difficulties can occur. Cortical spreading depression, a slow wave of electrical activity in the brain, is believed to contribute to aura symptoms. Approximately 30% of individuals with migraine experience aura.
Phase 3: Headache
The third phase involves a throbbing or pulsating headache, often accompanied by nausea and sensitivity to light and sound. If left untreated, this phase typically lasts between four and 72 hours. Abnormal activation of the medulla (the brain's "vomit center") can induce nausea and vomiting. Activation of the trigeminal nerve can release chemicals, including calcitonin gene-related peptide (CGRP), which are perceived as pain by the brain. Some injectable migraine medications specifically target CGRP to reduce pain.
Phase 4: Postdrome ("Migraine Hangover")
The final recovery phase, known as postdrome, involves the brain working to restore normal function. Individuals may experience increased fatigue or difficulty concentrating during this period.
Migraine Management Strategies
Recognizing the symptoms and stages of migraine development is crucial for effective management. If symptoms are predictable, particularly during the premonitory phase, carrying pain medications or anti-nausea tablets is advised for early treatment. This also signals a need for rest, ideally before the headache phase begins.
During the aura phase, migraine-specific pain medications like triptans, aspirin, or anti-inflammatory painkillers may prevent the onset of the headache phase. For individuals experiencing more than four migraine attacks monthly, preventive medications such as daily tablets or injectable options may be considered to manage baseline head pain levels.
It is important to heed the postdrome phase by resting, as overexertion can lead to overlapping migraine attacks, which are more challenging to treat. Additional symptoms such as dizziness, neck pain, or ringing in the ears warrant consultation with a neurologist to rule out other underlying conditions. Women who experience migraine with aura should consult their doctor regarding hormone-based contraception, as their treatment needs may differ.