I'm looking like a flat tire!!!

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Hello, I have been on this path for a year now and I am running in to a problem. I have lost 60lbs, most of with was my belly. Now my belly is looking like a flat tire. I look good in cloths but I do not like how I look nude. The lower mid section is a hard area to hit with a lower back problem. Will this go away or what do I need to do to tighten this skin up to my smaller body. I'm wanting to loose another 30lbs before I'm done but I'm scared of how I will look then.