Don’t take our word for it. Here’s every fact on this site, with its evidence grade, its caveats, and a link to the source, so you can check us.
We start you on the strong ones: findings that have been replicated or come from one large, well-controlled study. Moderate and weak facts are here too, labeled for what they are. Use “Link to this fact” to share a single card.
Skin allergy / Other evidence
Scented laundry and cleaning products (hair-styling products, laundry detergent, fabric softener, usually floral-scented) formed one group of odors migraine patients named, and chronic migraine patients named this group more often than episodic patients (P = 0.037).
Weak evidence.
Caveats
Only 16 chronic patients, no correction for multiple tests, and the paper's own percentages do not reconcile; cross-sectional, so it cannot show that chronic migraine increases sensitivity.
Information, not medical advice. See also: myths we won’t tell you.