It seems as though my facial-cranial sweating is connected not really with humidity, but rather the dew point. I've kept track of both, I don't have nearly as much trouble during winter, but again, if its raining or the dew point is high, here it goes I hate that cute little raincoats are so out of the question for me. I've tried almost everything including glyco and the antiperspirant (although not dabbed in my hair ( it didn't do much for my skin), so i guess its hopeless for now
You need to see your doctor ASAP. He/she will prescribe drugs that might work. Its very much a trial and error way. Hope it works.