An environmental factor is anything in the surrounding physical environment that triggers migraine. For example, many migraine sufferers commonly report weather as a major factor. Weather characterized by low barometric pressure and drizzly, overcast skies, is associated with a higher number of migraine attacks.
Some sufferers can actually predict oncoming storms.
Exactly how weather triggers migraine is not well understood. One specialist suggested that electrically charged ions in the air may have an effect on people s biochemistry, and in migraineurs, the reaction is a headache. While you can t control the weather, keeping abreast of the forecast will help you prepare by minimizing other trigger factors. Bright, flashing or flickering light can trigger or intensely aggravate migraine. The headlights of oncoming traffic at night and rapidly changing light patterns in movie theatres and clubs often make migraine sufferers avoid these activities.