Lumps from Sculptra butt lift? How true I that information and what are the statistics of this occurrence?

I’m considering sculptra butt lift as I’m very thin and do not have enough fat to transfer to my butt however I’ve been reading about lumps and bumps developing from sculptra that often require surgery to be removed. How true I that information and what are the statistics of this occurrence? I’m worried now as I had sculptra in my temples 2 months ago and was not warned of this risk so I’m very concerned that I’ll begin developing lumps in my temples over the upcoming months.