Do you know about tummy tuck waist fat losing belt? is it good to be used beside exercise ?

Likely bogus: Try it if you want to (i wouldn't), but no good data that it does what you want, or what it claims to do. Can't spot lose fat on your waist; part of general weight loss. Exercise tones muscles, doesn't "lose" fat, unless you burn enough calories to lose weight in general.

Tummy tuck: Tummy tuck, liposuctionof waist area are surgeries done when you have excess hanging skin and fat deposits in the flank areas. If the skin is taught and nooverhanging then, liposuction may improve the outcome.

Let the buyer beware: These thing have come and gone several times over the years. The problem is that for a short period of time than can shift the water in your tissues and it look like an improvement. Then the water comes back and there is no difference.