not sure what to tell you about that but I have had the same problem a few years ago. I was playing with a band and we had about 5 sets and about half way thru my wrist would do something very simler but it would start to go numb and the only way to make it stop was to stop playing for a while,
the only thing I found that helped was that I had gotten into playing with wrist in the wrong postion. not sure what wrist is hurting you but I am going to guess it is your right. I would start out buy readjusting your hihats to a diffrent postion, also doing some practice on a pad and make sure that you are holding the sticks in the right postion because that can mess your wrist up if it is in the wrong postion while playing, it should be the same postion as playing on the snare as on the hats so I would start by repostining your hats and go from there, if the problem keeps up see a doctor there could be an underlying problem that your not aware of.
on a minor not my wrist started hurting on the thrash/metal songs as well so I really do understand
