3 months after Restylane lip filler, lumps on lips still there. I want to get more filler added in about 1 month. Thoughts?

Hi, I had Restylane injected into my lips in Feb and I developed small lumps that are noticeable only when I smile. I want to have 1 ml added by late June. Do I have to get the lumps removed( will they get filled with more filler if I add more to my lips) or can the docs add more filler without causing them to fill up more? If I do have to remove the lumps, how many days before my next lip filler treatment should I have this done?