I have geographic tongue but thankfully it's not affected by spices. However, I can only use "regular" flavor toothpaste and "cinnamon" gum will send me to a wo

I have geographic tongue but thankfully it's not affected by spices. However, I can only use "regular" flavor toothpaste and "cinnamon" gum will send me to a world of pain and anguish. I wonder if and why different irritants affect different people differently.