Very often, loose and wrinkly skin is the one negative side effect to losing extra weight. When we gain weight, the skin stretches out...and in general, over time, skin starts to lose some of it's elasticity. That means it isn't going to completely shrink up or snap back into place once weight is lost. Exercising could help tighten it up somewhat....toning, and strength training type stuff.
I found this article that might be helpful to you as well. Good luck!
www.quickanddirtytips.com/health-fitness/healthy-eating/how-to-tighten-loose-skin-after-weight-loss
DX:6/12 Mild UP:got/kept remission w/1 Canasa nightly
MAJOR Flare began end of 11/12
Flex Sig 12/14/12:UC,mod/severe left side
Flex Sig 2/4/13:UC Severe into transverse colon
Prednisone refractory,little to no relief from enemas or Remicade
Proctocolectomy w/end ileostomy 3/13/13
Pathology showed Severe Chronic UC into right colon
Finally off Pred as of 4/24/13
So far my new,healthy life is GREAT!