Thank you for your question.
I would recommend following the post-operative instructions of your plastic surgeon because every surgeon has slightly different protocols. I usually recommend that my patients sleep on their backs for the first week. If after a week, everything is healing nicely and the patient is comfortable to do so, they can then sleep on their sides or stomachs but every patient heals differently so it is really a case by case decision. Best of luck.
James Fernau, MD, FACS
Board Certified ENT
Board Certified Plastic Surgery
Member of ASPS, ASAPS, ISAPS, The Rhinoplasty Society, AAFPRS, OTO/HNS, ASLMS, International Federation for Adipose Therapeutics & Science