After 40 kg of weight loss my body specialy tummy has become lose and it is nearly hanging what can i do 2 tighten it?

Tummy tuck: Though you can expect some skin tightening early on after a large weight loss, most often there significant excess skin which has been stretched from the previous weight gain. This skin will not go away without surgery. A tummy tuck would address the belly skin and in some cases, breast, arm and thigh lifts are indicated. Consult a board certified plastic surgeon for more specific recommendations.

Surgical Tummy tuck: With a significant weight loss, resulting in significant loose skin, a tummy tuck is most appropriate to consider, as excess skin absolutely needs to be removed.