It is best to discuss your concerns with your PS. Massage, deep lymphatic massage and ultrasound are all useful but best to take advice.
Yes, ultrasound may help reduce the swelling but ultimately the healing process will require up to 6-8 months of time in order for the bumps, numbness nad swelling to subside. Most of my clients find that their healing has stabilized by about 3-4 months after surgery and they look great at that point. Hope this helps!