What procedure would be best to remove these neck rings in 24 year old? (Photos)

Hi RealSelf community, I am a 24-year old woman, and I am about 5’8 and 115 pounds. When I was younger, I used to be a lot heavier, but after my teenage years, I lost the weight. I noticed I have neck creases - photos are attached. I believe these resulted from looking down often (“tech neck”) while growing up, as well as having a heavier weight. What procedure would be best to remove these neck rings? A doctor suggested fillers, but I know these are temporary.