Untether Skin from Muscle to Fix Bumps/pitting Caused by Lipo?

In my experience this is loose skin and best treated by a thigh lift. However, most pateints are reluctant to undego this extensive of a procedure. Fat injecting alone could make the dimpling more prominent.

You can try to have just the fat injections but sometimes you also need to untether the skin if it is really stuck down. 

Although fat injections are very good for depressions in the subcutaneous compartment after surgical or traumatic events, some depressions are anchored by your collagen bands and the fat won't displace the epidermis and dermis high enough. In fact, if this situation exists, the fat could extend outwardly beyond the depression which can raise the normal skin and make the depression look deeper! Your plastic surgeon has examined you and has a better idea if fat injections without the untethering (subcision) could help or if the subcision is necessary.