How to get rid of these rolls underneath my bum?

I currently do 2 days of leg/hamstring exercises per week and 1 day of HIIT, but they don't seem to be getting any better!
If anyone has any suggestions it would be greatly appreciated, thank you in advance!

Tinypic.com/r/nh08pc/9

by emmajay109 via Bodybuilding.com Forums - Female Bodybuilding