Hi Anisha. The Radiesse cannot be dissolved but you should go to see your practitioner anyway. There is a side effect of Radiesse called a granuloma and you want to know whether or not the bump is one. If it's not, you will just have to wait for the product to go away. If it is a granuloma, it might be suggested by your practitioner to use steroid injections to flatten it out. Good luck.
It may be possible to dissolve Radiesse with a substance called sodium thiosulfate. In vitro and in vivo studies were performed and demonstrated the reversibility of Radiesse with intralesional STS (Sodium thiosulfate). They were small studies, but promising. I believe that they are planning on doing a larger, in vivo study, to provide more insight.