Can the fat transferred into your buttocks rot or harden?

Thank you for your question. For the best results get any cosmetic procedure done by a board certified plastic surgeon with experience. Lumpiness is uncommon with a BBL. If you want to avoid these risks then choose a plastic surgeon with experience in this procedure. For the most part this procedure is very common and safe if done correctly by a board certified plastic surgeon. Best of luck!Dhaval M. Patel Double board certified Plastic surgeon Hoffman Estates Barrington Oakbrook Chicago 

Lumpy areas on the buttocks after fat transfer is very uncommon. The lumps are from fat necrosis when clumps of fat cells may die. Fat necrosis can be avoided by placing small amounts of fat deep into the muscle of the buttocks, not injecting the fat in clumps. See an experienced board certified plastic surgeon to do your buttocks fat transfer. 

Fat necrosis (cell death) occurs with all types of fat transfer procedures, not just with fat transferred to the butttock. To minimize this the fat must be injected in very small amounts, deep into muscle with enough space in between each area of fat cells.Best wishes,Dr.Bruno

Is very true that fat transfer can result in that death and internal scarring of the fat. This is typically due to placing that tennis too tightly packed into this buttocks space.

   Fat necrosis can occur with fat transfer to any area.  I have found this to be rare in the thousands that I have performed.Kenneth Hughes, MDLos Angeles, CA