Recently, while traveling in Uganda, Africa (about two weeks into the trip), I started waking up with red itchy hands in the morning. Also the syptoms appear with exposure to cold, and when I sweat or exercise, and the reaction spreads all over my body on occasion...and I still have them since returning home two weeks ago. I was taking Doxycycline for malaria prevention, for about 30 days, and stopped about a week ago. Reaction to the meds? Nasty tropical disease?