I don’t always get auras with migraine episodes, and the only kind I get when I do is a strong but fleeting scent. One from not too long ago that’s stuck with me is the aroma of Big Red gum.

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I’m pretty sure I haven't chewed or even thought much about it in close to 40 years. I certainly didn’t remember it being such a distinct sort of cinnamon — and that surprise of specificity is a recurring theme with the smells, be they a brief reminder of the brand of cigarettes Dad’s parents smoked or the musty, vinegar-ish scent of the wood in parts of Mom’s parents’ house. I’ve smelled garlic, not as prepared with any particular dish that I recall, and the breath of my late cat Pebbles.