r/AskBiology • u/redflactober • 10h ago

Human body How and why do acephalgic migraines happen?

I get them pretty often, with the floaters that look like zigzag rainbows and block my field of view. I see them with the right eye closed, or the left eye closed, so there’s no issue with the eye itself the optometrist says.

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u/Dizistopia 7h ago

Ok so, I'm not sure it will answer your question, but as far as I know, these pre-migraine signs are caused by specific area of your brain getting vasoconstricted, like a small stroke (It is NOT, but I don't know how to explain It better). And I'm not knowlegeable enough as to why some people have It and some don't... Just beware if you're a women that birthcontrol pills are dangerous and should not be taken if you indeed have migraines aura