I've been doing pilates and generally getting a bit fitter. Haven't lost an ounce, but have dropped a dress size. HOWEVER, I now have a horizontal line on each thigh, just past halfway up. It feels like a dip in the muscle/fat and is visible in leggings (it kind of looks like I've been wearing tight shorts or leaning on something). Anyone know what it is? Is it just a weird fat loss thing that will go away or am I doing something wrong??