Carry around a bottle of Listerine (if you don't already). Since your mouth is a natural source for large amounts of bacteria make sure to swish multiple times throughout the day. Especially after you eat or drink.... food trapped (ie: salt content, etc...) will be washed out to help avoid swelling... you will find your tongue will be the most swollen in the morning... first thing you want to do is get some water in your and that ol' faithful listerine.