Persistent swelling after a scarless lip lift. How can I treat this? (Photo)

I had a scarless lip-lift 16 months ago, where the incisions were done inside my top lip. I had swelling for weeks, with the worst of it concentrated in the middle part of my top lip. My surgeon performed 2 rounds of injections to try and reduce the swelling, which didn’t work. He then cut away more skin inside my top lip, but I am still left with a ‘bubble’ in the middle of my top lip, which hides my teeth when I smile. Should I consider surgical removal of this seroma?