Anyone know what this is? I went to the doctor today and I was givin one of 2 options. Its either nectizing fasciitis (NF) or cellulitis. My wife found some medical websites that state that steroid use is a poss cause for NF. Im hoping for cellulitis. And no this wasnt an injection site. It came out of nowhere. I go back to the doctor tommorow so he can see how fast its spreading. I got an antibiotic injection and oral anticiotics taday. If it dosent go down by tomorow, I will be admitted to the hospital for more aggressive antibiotic therapy. It doubled in size in24hrs. What scares me is that the center is black and growing. If anyone of you have had this before, let me know your thoughts. The middle is numb but the red surrounding are is extremely painful.