Lump After Subcision with Filler to Upper Lip

I had subcision with filler on my upper lip to correct an indented scar I had there. Unfortunately the lower part of the scar is still raised and bumpy, although the bruise has disappeared after a week.
It has now been 2.5 weeks since the procedure and the lump does not improve despite massages.
Do you think it is due to some filler overfill or some blood still trapped under the skin?
I’m attaching a picture now and the day after the procedure.