Working out at gym, I get this absurd rash?

[Lisa]

I seem to be alittle older, early 40"s and since I have gone over that hump I notice more changes to my body. UGH!! Anyways, I work out everyday weights, elliptical and treadmill and have noticed for someone who never sweat I literally am dripping when I get out of the gym now. Its terribly embarressing as well. Does anyone know if this can be avoided or does it frankly come with age? Also the more embaressing question I have is that everytime I work out I develop a slight rash/with small bumps on a butt cheek of mine. Now I can deal with the sweat more than I can deal with this..lol.Could this be related to the sweat and I just want to know how to get rid of them with out giving up working out?Any suggestions onhow to get rid of this rash please let me know>>>>