Belafill injections about a year old. Suddenly, the injection sites have become hard and even. Seem to have moved. (photos)

Based on the history you provided, I think this IS likely to be a reaction to your filler injection and you should consult the physician who injected the Bellafil.   If it is not a condition they feel comfortable evaluating and treating, ask them to refer you to a physician to help you manage and treat the problem.   There are true biopsy proven granulomatous reactions ( firm lumps like you have described) to injected materials, and this can occur long after the material is injected.  Infectious agents, particularly atypical mycobacteria, could also cause what your photo is showing, and your doctor will likely want to do both tissue cultures and biopsies.  Autoimmune skin disorders could also cause these skin changes and things like sarcoidosis and discoid lupus are also in the differential diagnosis.  The skin biopsy and some blood tests would help to give the doctor information about the autoimmune disorders.   

You need an evaluation by your injecting physician. This is hard to see in the pictures. This can represent a granuloma, nodule, or infection. These are treated differently so physical exam and history will lead to the right diagnosis. Most likely, injection with 5FU with Kenalog is needed to take care of this.