Started experiencing cranial hyperhidrosis in 2016, in summer, during any outdoor physical activity. Also happened several times in closed garage with AC running, but not as cool as in home. Symptoms relieved when went back in to home AC environment. Started sweating again this year while working outdoors during warm & humid weather. Only sweat from head, actually seems to be from forehead, dripping down into eyes. No excess sweating experienced from anywhere else. Go inside home and sweats go away.