Why do I sweat so much?

[SimonMK]

I know its summer and outside is hot, its just compared to everyone around me, I sweat ridiculously. I mean during my training in the gym, like around 30 minutes, the whole back of my t-shirt is wet while the other guys is just wet around their neck. Have to change my t-shirt. When I walk outside my face most of the time sweat and its annoying to wipe my face. 1 time my t-shirt also had the whole back wet while everyone looked fine.

I doubt its my long hairs since there lot of girls with long hairs not sweating at all. I mean even in supermarket/mall I sometime sweat and kinda embarrassing to try to talk to a girl while I am sweating like crazy.