I've had this happen several times before, but today while riding about 42 miles I had the middle part of my upper lip swell up. It's come back down now, but still it is irritating while riding. What in the world is going on? Should I throw my water bottle away? Is it a matter of bacteria getting on the lid of my bottle and affecting my lip in the place where I drink the water? Is it an allergic reaction to the outside world (these are days when allergens are plenty)? Or am I just a freak?