Ambivertigo

Is there a strong link between the microbiome and autoimmune disorders such as psoriasis? Is it possible to reduce flare ups with a diet change? Or conversely are there any microorganisms suspected of making autoimmune issues worse?

Is there any link between synesthesia and migraine? Both myself and my sister have number and letter associated synesthesia and migraines while neither parent has either. I've always wondered if that's linked.

Also, I get mild migraine with aura while my sister has the classic vomiting migraine but no aura. Are they different conditions?

Is it possible that auras can crop up in children without the headache? I have distinct memories of what I believe is termed alice-in-wonderland syndrome. Could these have been early manifestations of migraines?