Sorry to hear that - lumps and bumps are not a normal part of treatment, so the first thing I would suggest is to contact your doctor and get their advice, as they should be best placed to help you. As to the cause and the best of managing these it depends on a number of factors - what filler was used, how long ago were you treated, is there any pain or redness. Without all of this information its not possible to give you clear advice, so again contacting your doctor should be the first thing to do.Best wishes,