It's not just the weather.

Barometric pressure gets blamed for a lot of migraines. And it's not wrong — pressure changes do trigger attacks for some people. But if weather is the only thing you're watching, you're probably missing what's actually driving the pattern.

The problem with single-trigger thinking

Most people who get migraines regularly have tried to figure out their triggers. They cut out red wine. They stop eating aged cheese. They check the weather app before making plans. And sometimes it helps. But often the next migraine arrives anyway, on a clear day, after a perfectly fine dinner.

That's because migraines rarely have one trigger. They have thresholds. Your brain has a tolerance for accumulated stress — physical, neurological, environmental — and when enough factors stack up at once, that's when the attack happens. Not because of the one thing you ate. Because of that thing, plus three others you didn't notice.

What's usually in the stack

The factors that tend to compound aren't exotic. They're the ones that are easy to dismiss because they feel too obvious:

• Sleep — both too little and too much. Sleeping in on weekends is a real trigger.
• Dehydration — not dramatic thirst, just consistently under-drinking across the day
• Stress load — not acute panic, but sustained background tension over days
• Skipped meals or long gaps between eating
• Caffeine timing — especially if it shifts by more than an hour from your usual
• Hormonal changes — cyclical patterns that don't get logged because they feel unrelated

None of these feel like "triggers" in the dramatic sense. But stack three of them together on a day with a weather front moving in, and you've got a migraine. Remove one and maybe you don't.

Why a headache diary alone doesn't work

The standard advice is to keep a headache diary. Write down when attacks happen, rate the pain, note what you ate. It's a reasonable start. But it's backwards.

You're recording the attack. You're not recording the two days before it — the nights you slept badly, the meals you skipped, the work deadline that had you clenched for 48 hours. That's where the pattern lives. And it doesn't show up if you only log when your head hurts.

Consistent daily logging — even on good days — is what turns a list of headache dates into something you can actually use. The good days are the baseline. Without them, you've got no comparison.

What actually helps

Track the full picture, every day. Not obsessively — a quick check-in is enough. Sleep, stress, hydration, meals, caffeine, how you feel. When a migraine hits, look back two or three days. The pattern is almost always there.

Over time, your personal threshold becomes visible. And once you can see it, you can start managing it — not by avoiding everything on the trigger list, but by knowing which combination of factors tips you over the edge. That's a very different kind of control.