2 months post op cortisone injection, I have fat atrophy. Is this normal?

Atrophy can happen after cortisone is injected anywhere on the body. If the cortisone isn't injected right into the acne cyst itself it can get out and cause a small divet. It will repair itself with time, but it can take a long time, even a year or more. Sometimes this can be filled with a filler like Juvederm or Restylane (which you had). I nearly always prefer Restylane, as Juvederm will get a bluish tint like you had if it's too superficially injected into an area. I would not recommend anything other than filler be done - surgical excision, etc. as that's really the only other option. If you go down this road you will be left with a scar there no matter what. So, if something eventually will fix itself on it's own, I would not do a surgical procedure. You can have the site refilled with Restylane as the site fixes itself. This is your best route. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."