One word/phrase to describe the reaction when you eat a very spicy-hot food
My mouth is on fire!!
Is a phrase that is commonly heard in Mexican, Indian, and Thai restaurants worldwide.
Help !!..My Mouth Is On Fire !! 1
What To Do When Your Mouth’s On Fire From Red Hot Chili Peppers 2
Ya, just ate something spicy and my mouth is on fire. I tried drinking water and that didn't help. I also tried orange juice, and that didn't help. 3