Fat can be obtained from any common donor sites such as abdomen, flanks or thighs and is injected in the back of the hands where it will add slight thickness to skin and soften the dark or light color of veins and tendons respectively. This can be done all under local anesthesia or in the hospital if you are having another procedure done under general anesthesia.
If you desire more fullness, the procedure can be repeated after 6 months. It usually takes that long to finalize the amount of fat that will "take." I personally haven't seen or had anyone coming back for more injection to their hands.
It involves 1 - 2 small injection holes on the back of each hand. They will be swollen for a week but you should be able to carry on with your life doing your daily activity. No washing the dishes/ doing laundry or hand massage for 2 week.