Neck rings are very difficult to treat, mainly because the rings themselves are etched in the dermis. Meaning, even if you stretched the skin, you would still be able to see the lines in the skin. Therefore, my recommendation would be to remove a ring AND stretch the skin. This will lessen the overall appearance of compressed multiple rings, like the "michelin man". The way that is accomplished would be by performing a neck lift which would stretch the skin, as well as removing skin between rings and creating one ring where there was two. This would create a smoother, more natural look. Seek an experienced plastic surgeon you can discuss this with. I wish you the best.