I would recommend contacting your surgeons office for their recommendation, as it depends on the type of anesthesia you are having and the time of the day that your procedure will be performed.
As the frequency Hz increases penitration of the energy decreasea neans it acts more superficially. In clinical terms 40000 Hz is more superficial and concentrated than 22000 Hz at same energy level. 40 k device are more powerful but can can causes skin burns...
My suggestion is to allow the area to heal for at least 12 months. After that time, if the swelling persists then selective and limited suction lipectomy can be done to get symmetry. You are doing everything you are supposed to do. Some patients can have prolonged swelling (edema).
