How to sleep after liposuction and fat transfer to hips?

Hello and thank you for your question. I usually recommend sleeping on your abdomen after this procedure.  Make sure you
specifically look at before and after pictures of real patients who have
had this surgery performed by your surgeon and evaluate their results.  The
most important aspect is to find a surgeon you are comfortable with. I
recommend that you seek consultation with a qualified board-certified plastic
surgeon who can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

The short answer is whichever position is most comfortable for you!  I recommend using a lot of pillows to prop yourself up.  You should avoid pressure on the area of the fat injections.  Some patients are very comfortable sleeping on their abdomens whereas others never sleep in this position and would prefer to move from side to side.