Why do I sweat so much!?

Now, this has been the story of my life the past couple years. I'm the guy that "sweats". Plain and simple. There's no escaping it. The other day I was out in the garden, just some simple turning up the ground, getting the soil moved around a bit, for maybe 10 - 15 Minutes. I come back pouring sweat. I'm in gym cl, playing Ping-pong and badminton, and I go to my next period, sweaty, from PING PONG!!! Thing is, I'm not tired. I'll be pouring sweat, and still warming up. And, I'm not overweight, hardly. I'm 6'1, and 220 lbs. i work out everyday for track, and run, and lift. I'm also only 15. My father and brother are pretty heavy sweaters as well, but nothing like me. I use deodorant everyday, and antiperspirant kind as well, nothing helps. I hate the stinky, sticky feeling, day after day. My mom told me if I really thought it was bad enough, I could go to the Doctor, an over active gland maybe, or something like that. Do you guys think it's worth checking out? Thank you!