I have a cyst on my jawline that was injected with cortisone (multiple times) its not going away and now some of the skin around the area that was injected yesterday has a greenish hue to it i cant tell if its bruising from the injections ?

Bruising: For peace of mind,Have the physician or specialist who performed the procedure to inspect the discolored area if you have concerns.

It probably is: It probably is due to the injections, sometimes the needle can "hit" a blood vessel and this can cause bruising, it's common and normal for this to happen, also, cortisone can have effects on the skin such as bruising, peeling or color loss. But you should keep an eye on the bruise, in case you notice anything suspicious or pain you can always ask again, or visit your physician.