This is a particularly vexing problem for many women. The key element in evaluating a patient is whether the skin is loose. If not, then you should get a good improvement from liposuction, which can be performed on both the inner and outer thighs. If your skin is loose, however, liposuction would exchange one problem for another and excisional thigh surgery might be indicated. This can only be determined in a consultation with a board certified plastic surgeon.
Inner thigh rubbing may be treated with liposuction if the leg skin is not too loose. Sometimes, skin excision is required.