The photo shows a slim abdomen with mild loose and wrinkled skin around the belly button and lower abdomen, as well as a visible piercing scar. A tummy tuck is usually the most reliable way to remove true loose lower-abdominal skin, improve the lower scar area, and reshape the belly button when skin laxity is the main issue. It can also repair muscle separation if present, but that requires an exam. If your main concern is mainly the piercing scar or the frowning shape of the belly button, smaller options may be possible, such as scar revision, umbilicoplasty, or limited skin tightening. Those options will not remove extra abdominal skin the way a tummy tuck can. At 100 pounds, liposuction is unlikely to be the main answer unless there is a small localized fat pocket. An in-person consultation can determine whether a full tummy tuck, mini tummy tuck, or targeted belly button/scar revision best fits your anatomy and goals.