Hot coffee with milk and Sugar used to tear me to pieces when I was sick. What's crazy is that it took me so long to make the connection that the coffee was messing me up. In retrospect I am fairly certain that it was a combination of the coffee's super-acidifying effect on the body along with it leaching mercury out of the 12 aging mercury dental fillings I had at the time.
I also agree about hot and spicy sauces, chili sauces, etc. Especially ones that contain vinegar. These used to tear me up as well. Although I don't think cayenne falls into that same category, as someone already pointed out, cayenne is supposed to be healing and alkalizing. I supplemented much with cayenne since getting sick and have noticed a positive effect on blood circulation.