3 Weeks Post-op from Circumferential Abdominoplasty. Can I Use Heat Vibration Massager?

im still pretty swollen on my back and tummy area and wondering if it would be ok to massage the tummy and lower back area with a heat vibration massaging tool. would the massage actually help the swelling go down and help get rid of a golf sized knot i have near the inner thigh by the groin? thank you very much for your time.
