it s been a year now that I had fat transfered to my butt and It seems like I have fat necrosis (the fat inside is very hard).A doctor tried to break it to be aspirated but he failed.He aspirated only the surronding fat which was infected (kind of abscess because the area was inflamed).This caused cellulitis.I t started with strong fevers then my hips were inflamed and became so painful that I just screamed when anyone touched those hips.The doctor said he spread the bacteria with the cannula.