Yeah - I got that especially when I'm a bit in a busy lifestyle, or a nasty warm weather. Now it's in the cheeks, which makes chewing hard sometimes. It's hard for me to eat the vegetables because it gives a burning feeling. Rest of the food is still OK. Only thing to relieve the thing is the Orrepaste. Any other methods suggested? Some of them said that putting a bit of Magnesia milk onto that painful zone can give a long lasting relief.