A migraine is far more than a bad headache. It’s a neurological event that can last anywhere from 4 to 72 hours and typically involves throbbing pain on one or both sides of the head, nausea, and intense sensitivity to light and sound. Migraine affects women two to three times more often than men and is one of the leading causes of disability worldwide. What many people don’t realize is that a migraine attack can unfold in up to four distinct phases, with symptoms that start hours or even days before the headache itself.
The Four Phases of a Migraine Attack
Not everyone experiences all four phases, and the intensity varies from one attack to the next. But understanding the full timeline helps you recognize what’s happening earlier, which can make a real difference in how you manage it.
Prodrome: The Early Warning Signs
One to two days before the headache hits, your body often sends signals that a migraine is on the way. This phase can last several hours or stretch across multiple days. The symptoms are subtle enough that many people don’t connect them to migraine at all.
Common prodrome symptoms include mood shifts (from irritability to unexpected euphoria), fatigue, difficulty concentrating, neck and shoulder stiffness, sensitivity to light and sound, insomnia, nausea, and digestive changes like constipation or diarrhea. A few symptoms are especially characteristic of this phase: excessive yawning, food cravings, increased thirst, and frequent urination. If you notice a pattern where these symptoms consistently show up a day or two before your headaches, you’re likely catching the prodrome.
Aura: Sensory Disturbances
About one in four people with migraine experience aura, a wave of sensory disturbances that usually develops gradually over at least five minutes and lasts up to 60 minutes. In roughly 20% of cases, aura can last longer than an hour, and it doesn’t always come before the headache. Sometimes it starts after the pain has already begun.
Visual aura is the most common type. You might see flashing or shimmering lights, zigzag patterns, sparks, dots, or blind spots in your field of vision. These disturbances are temporary and fully reversible, but they can be alarming if you don’t know what they are.
Sensory aura involves tingling or numbness that often starts in one hand and moves up the arm, sometimes reaching the face. Less commonly, aura can affect speech, making it difficult to find words or speak clearly. These symptoms build gradually rather than appearing all at once, which is one way they differ from stroke symptoms (which tend to come on suddenly).
The Headache Phase
This is the phase most people associate with migraine, and it typically lasts from several hours to up to three days. The pain is usually pulsating or throbbing, often concentrated on one side of the head, though it can affect both sides. It ranges from moderate to severe, and routine physical activity like walking or climbing stairs makes it worse. Many people find that even small movements intensify the pain.
The headache phase brings more than just pain. Nausea and vomiting are extremely common. Sensitivity to light (photophobia) can make normal indoor lighting unbearable. Sensitivity to sound (phonophobia) means conversations, music, or everyday noise feel amplified and painful. Some people also develop sensitivity to smell, where certain odors trigger or worsen nausea. Anxiety, restlessness, and an inability to sleep often accompany the pain, even though rest is what the body needs most.
Postdrome: The Migraine Hangover
After the headache fades, the attack isn’t necessarily over. Most people enter a postdrome phase that feels a lot like a hangover. You may feel exhausted, achy, and foggy. Concentrating on tasks or making decisions feels harder than usual. Dizziness, lingering light sensitivity, sound sensitivity, and nausea can persist. Some people experience mood swings, from feeling unusually happy to suddenly low.
The postdrome varies in length. For some it’s a few hours, for others it lingers into the next day. Resting in a dark, quiet space and staying hydrated tends to help. It’s worth factoring this phase into your recovery time, since pushing yourself too hard during postdrome can sometimes trigger another attack.
Less Common Migraine Types
Some migraine variants produce symptoms that go well beyond typical head pain. Vestibular migraine causes episodes of vertigo, dizziness, and balance problems that can occur with or without a headache. It’s one of the most common causes of recurring dizziness and is often misdiagnosed.
Hemiplegic migraine is a rare type that causes temporary muscle weakness on one side of the body during the aura phase. If you raise both arms overhead during an episode, one arm will feel noticeably heavy and harder to keep raised. Other symptoms include vision changes, tingling or numbness in the face and limbs, difficulty speaking, confusion, and fatigue. Because these symptoms mimic stroke, hemiplegic migraine often leads to emergency evaluations, especially the first time it happens.
Symptoms That Signal Something More Serious
Most migraines, while painful and disabling, are not dangerous. But certain headache features suggest something other than migraine may be going on. These red flags warrant prompt medical evaluation:
- Sudden, explosive onset. A headache that reaches maximum intensity within seconds, sometimes called a thunderclap headache, can indicate a vascular emergency like a brain aneurysm. This is one of the most concerning headache features.
- New neurological symptoms. Weakness in an arm or leg, new numbness, or visual changes that don’t fit your usual migraine pattern can point to a secondary cause.
- Fever, night sweats, or weight loss. Systemic symptoms alongside headache suggest infection or another underlying condition.
- New headaches after age 50. Most primary headache disorders start earlier in life. A first-time headache in someone over 50 is more likely to have a secondary cause.
- Steadily worsening pattern. Migraine typically fluctuates in frequency and severity. A headache that progressively gets worse or more frequent over weeks is a red flag.
- Pain that changes with position. A headache that intensifies when you stand up, lie down, or strain (coughing, bearing down) may indicate a pressure-related problem in the brain.
- New headache during or after pregnancy. This can signal vascular or hormonal complications that need evaluation.
How Migraine Differs From Other Headaches
Tension headaches, the most common type, produce a dull, pressing sensation on both sides of the head. They don’t typically cause nausea, vomiting, or the intense sensitivity to light and sound that defines migraine. Tension headaches also aren’t worsened by routine physical activity the way migraines are.
Cluster headaches cause excruciating, one-sided pain around the eye, often with tearing, nasal congestion, and restlessness. They come in bouts lasting weeks or months and are more common in men. The pain peaks within minutes and typically lasts 15 minutes to three hours, shorter than a migraine attack.
Migraine’s distinguishing features are the combination of pulsating pain, moderate to severe intensity, worsening with activity, and at least one of the following: nausea or vomiting, light sensitivity paired with sound sensitivity. If your headaches consistently check those boxes, especially if they last 4 to 72 hours and you’ve had at least five such episodes, they fit the clinical profile for migraine.