I had the same bloody nose prob with the harsher PH's (Phera, SD). I finally found out it was because they elevated my blood pressure enough to create the problem. It got so bad that even taking a hot shower would start the nose bleeding, forget about just blowing my nose. Since, at the time, I didn't know what was causing it, I wasn't checking my BP so I don't know my values during that time. Not sure if there are OTC supps out there to mitigate blood pressure that high but I've had less of an issue with it on less harsh PH's. Good luck to you man.