Thank you for your question.
Every surgeon will have a slightly different aftercare protocol based on their technique, experiences and beliefs so it is important to follow their instructions. I believe that the patient should not put any pressure on the buttocks for at least 3 weeks post op as it can increase the risk of the fat cells not surviving. The first week I do not recommend any sitting or pressure on the buttocks, days 8-14 the patient may sit up to 5 minutes two times per day. Days 15-21 the patient may sit up to 9 minutes five times a day only then days 22 and beyond sitting is fine as long as the patient is comfortable. If you must sit for longer durations, I definitely do recommend the BBL pillow and getting up every 10-15 minutes to walk around until you are at least three weeks post op. I hope this helps.
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