I had HIFU treatment 4 months ago. When I first had the treatment, my skin seemed plump. Now it seems deflated. The skin seems loose. I'm confused as to what has happened. If fat is melted by putting weight on, can I gain the fat back under my cheeks or is it destroyed forever? I went to one clinic that said the muscle contracts. Please can some one give me advice as to how I can repair with out fillers.