I had a restylane injection for a depressed scar. If you've done any research you know, is it fixed forever, no. For me, did it stop it from bothering me almost instantly, yes. Yes there was swelling, I knew that going in, The swelling was probably only noticeable to me and in certain lighting. Swelling went down in about 3 days. Make sure to ice as often as you can have some arnica topical...