My doctor says no garment is needed for BBL, and sitting and laying on back is ok. Should I worry?

Getting a nice result with a BBL means that a good majority of the fat transferred to your buttocks has survived.  Fat can only survive if it finds a permanent blood supply in the grafted area, and is not injured during the first 6-8 weeks.  This is the critical period where the fat is susceptible to damage, injury and fat cell death.  The single most preventable thing you can do to protect the fat is to keep pressure off your buttock for minimum 6 weeks.  This means sitting on a pillow balanced under your thighs so your buttocks are "floating".  Also, you should sleep on your stomach.  Hope this helps.

Hello dear!!
Thanks for the question and provided information as well.
Every doctor has their preferences in regards to compression garments. I suggest my patients use a full body compression garment (that closes with clips), 24/7 for the first 3 months, and after that, for 12 hours a day for 3 more months, to get the best results.
It is important for the compression garment to be very tight, for it to help with the swelling, after surgery, and to use it with a cotton t-shirt underneath to avoid garment burns.
Please, follow up close with your plastic surgeon.
Good luck :)