A leg lift or thigh lift, also known as a “thighplasty,” is a surgical procedure designed to tighten and firm the loose skin in the upper leg, thigh and buttocks which often results from significant weight loss or following liposuction for excess fat and tissue in the thighs. thighplasty will reduce the sagging skin of the inner/outer thigh and buttocks, and may be performed in conjunction with a body lift (lipectomy) to improve overall body contour. Patients considering a thighplasty are strongly encouraged to see a surgeon who is certified by the American Board of Plastic Surgery.