Why do i sweat when i'm nervous?

Sweatgland/adrenalin: The sweat glands are controlled by your autonomic vervous system in which high adrenaline state causes you to sweat..Emotionally induced sweating typically involves palms/soles/axilla areas. Your sweat glands maybe a bit sensitive to Adrenalin than usual, thus when anixous (adrenaline released/increased) you sweat more...If excessive, consult doc for treatment. Hope this helps. Good luck.

Norepinephrine: There is an increase in the release of the chemical norepinephrine with anxiety and one of the results is an increase in sweating.