花椒，辣椒治味覺失靈 - http://www.yimho.com/1466.html

"But capsaicin does not actually burn you," explained Jayna Metalonis, a dietician at University Hospitals. "Instead, it tricks your brain into thinking a temperature change has occurred, resulting in the sensation of heat and pain." - https://www.webmd.com/cholesterol-management/news/20220708/hot-stuff-spicy-foods-cant-harm-you-can-they