24, athlete, 5'9, 150lbs, will hyper-dilute Radiesse get rid of lines under butt? (Photos)

I'm 24y/o, athlete, very active and eat healthy. 5'9 150 lbs. This is one of my biggest insecurities and i just want to feel confident in a bathing suit! I was diagnosed with a tumor that depleted me of many of my hormones including Estrogen. So I had the estrogen levels of a menopausal woman. I'm assuming this contributed to these lines and caused laxity? Or could it be just fat/cellulite? Any suggestions on how to improve this area?