Sculptra is a great product and can have results lasting two years. I wish you had provided a photo to see what exactly is occurring. From your description I am not sure if it is an infection, allergy, or overfill. Please return to the treating physician or seek out a second opinion. I would avoid collagenase right now.
In this time frame I don't think this is collagen. I suspect this is edema due to a rare allergic reaction to the sculptra or more likely an additive. I had one pt like this and she responded to antihistamines and time. Don't do collagenase