while driving I will get tremendous pressure against forehead when going up or down in elevation, I understand why this would happen but to the extreme of pain is not understandable, a few times I would get nose bleeds, and the effects last almost a week. This has always been an issue while growing up, public pool would go from 4 ft to 8 ft I dared not go below 4 or the pressure would be unbearable.  But it has gotten worse over time and during less elevation climes.