migraines ?
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I get those too, such a horrible thing, I usually get lightening flashes that become worse and worse till I've almost got tunnel vision for about 20 minutes, then I can see again but get the screaming headache and nausea for about 4 hours. Not as bad as some I know but bad enough.... Anyway, basically the flashing lights are caused by a vascular spasm in the vision centre of the brain. Migraines without these flashing lights get the spasms on the surface of the brain, so the resulting headache and nausea etc is similar, it's just the early symptoms that arise from different areas.
With regards to the stroke risk, I just looked it up and found and article that says: recent research has concluded that migraine sufferers face 2.16 times increased risk of stroke compared to those without migraines. Those who also suffered additional vision interruptions from light affects had an increased risk of 2.27 times compared to 1.86 in migraine sufferers without aura. Other results indicate that female migraine sufferers who also take to pill are up to 8 times more likely to have a stroke but this risk figure is contradicted by other research results. The stroke risk is probably due to a blood flow reduction to the brain which is associated with a migraine. Almost 25% of women aged mid to late thirties suffer from migraines. More research needs to be done to determine the affect of oral contraceptive use on migraine sufferers with respect to risk of stroke.
Hope this helps....
Migraine is a painful neurological condition, of which the most common symptom is an intense and disabling episodic headache. Migraine headaches are usually characterized by severe pain on one or both sides of the head and are often accompanied by photophobia (hypersensitivity to light), phonophobia (hypersensitivity to sound) and nausea. The word migraine is French in origin and comes from the Greek hemicrania (as does the Old English term megrim). Literally, hemicrania means "only half the head."
The signs and symptoms of migraine vary among patients. Therefore, what a patient experiences before, during and after an attack cannot be defined exactly. The four phases of a migraine attack listed below are common among patients but are not necessarily experienced by all migraine sufferers. Additionally, the phases experienced and the symptoms experienced during them can vary from one migraine attack to another in the same migraineur:
The prodrome, which occurs hours or days before the headache.
The aura, which immediately precedes the headache.
The headache phase.
The postdrome.
I had one a few days ago , and mylife it was pain full. I also count not stop being sick.
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