Hi, my son, 17 yrs old has frequent nose bleeds, about 2 or 3 times a week, they take 5 to 10 minutes to stop, and bleed alot. This has been going on for about 2 years. Seems to have started after he went to a high adventure scout camp, Philmont New Mexico for 2 weeks of hiking and camping in the mountains. Any suggestions? Thanks, Chris YYYY@YYYY