This randomized phase III trial is studying Flexitouch® home maintenance therapy to see how well it works compared with standard home maintenance therapy in treating patients with lower-extremity lymphedema caused by treatment for cervical cancer, vulvar cancer, or endometrial cancer. Flexitouch® home maintenance therapy may lessen lower-extremity lymphedema caused by treatment for gynecologic cancer. It is not yet known whether the Flexitouch® system is more effective than standard home maintenance therapy in treating lymphedema.