Skin can sag in your inner and outer thighs as you age or after losing weight. Think about a thigh lift surgery as a solution.
An outer thigh lift is performed through incisions in the waist/ hip area and can be extended to lift the buttocks as well.
An inner thigh lift may require an incision in the crease between the leg and body (inguinal fold) in minor looseness from aging is present. However, sagging of the inner thighs from significant weight loss usually requires removal of excess skin along the entire length of the inner thigh from the inguinal fold down to the knee.
Many patients also include liposuction as part of their thigh rejuvenation procedure. Your recovery should take 1-2 weeks.