Big lump under the skin more than five years after getting Sculptra. What can I do?

It has been more than five years since I have gotten scultpra. I went back recently and did four rounds of steroid injections. I had to stop because it gave a small dent in my face. It was thinning my skin out. I still have a the large lump under skin. Steroid broke a small piece off now I have another lump under skin. What can I do? Went to derm and he doesnt know.