Hey there. I've been having this problem and hoping someone has had some experience dealing with this. Everytime I exercise, instead of perspiration coming from my head, I get an itch with a little flakiness instead. My head doesn't seem to sweat anymore. The same itch comes when I go into unusually dry and warm rooms like a computer lab or an old building with little ventilation. Any idea what could be wrong? I fear going to the doctor because I really don't want to end up taking meds but if I have to I will.