I had a thigh and knee liposuction, and the doctor recommended I remove small amounts of fat under my butt cheeks as he said it was starting to sag. But now post liposuction (it has been about 3 months), the skin is hanging and there is a fold. Will this go away? I also did lipo on my upper back arm. The upper part looks weird when I tighten my arm, is it skin or muscle? It feels like muscle...