I've been having nose bleeds about once a week for the past month or so and it's really starting to concern me. I have no idea why I am having them and no idea how to stop from having them. I'm doing about 100mpw now but I've done high mileage before(80-90 last summer) and didn't have this problem. I am beginning to worry that this loss of blood will effect my performance. Any suggestions would be greatly appreciated.