Steroid Injection to Correct Fat Injections?

Steroid injections can often reduce inflammation and cause atrophy of tissues, including of fat injections, so yes.
They cannot dislodge firm fat grafts that are composed of heavy fibrous (scar) tissue, rubbery grafts, or long-term inflammatory nodules, which must be removed surgically. Attempting to dislodge these nodules with sterid injections causes the more delicate tissues around the lumps to dissolve, creating a crater... with the nodule still there.
Your board certified plastic surgeon can help with guiding you through the process of which technique is most beneficial and when.

Time will usually result in resolution of lumps following fat injection. Massage can speed this process. Kenalog (steroid) injections also help but can result in atrophy of surrounding tissues and should be used conservatively.Stephen Weber MD, FACS

 

Kenalog injections may help improve firmness and swelling of injected fat.  This is also often combined with gentle massage, which help speed up the process