Does Anyone Know a Massage Technique for Lumps Following Facial Fat Transfer?

There is no one technique and at 3 weeks it is likely that this will improve with time. Some practitioners promote the use of manual lymphatic drainage to promote resolution edema and healing.

3 weeks is early so dont be worried and be patient, I would suggest squeezing it between your two fingers with one in and one out of your mouth to really get a lot of pressure on it

As this one remaining lump is on the lip area, your doctor should evaluate your bump to ensure that it is a fat deposit and not a cyst of a salivary gland or sebaceous gland. Massaging usually is best done on the lip by placing the thumb inside and an index finer outside and pressing together in a round fashion.  Occasionally doctors need to place a drop of corticosteroid into a lump to make it flatten faster. There can be side effects of this so discuss it with your doctor.