I had some bad lines in the creases of on the side of my mouth. I was SO nervous about doing this -- worried it would look weird or fake. I went to a plastic surgeon's office and it was a little painful, but I only got one tiny bruise that i could cover with make-up and it went away quickly. It is now about a year later and I am still stunned at the difference -- those lines are gone but the effect is so subtle. It is perfect. I will definitely do it again when it wears off!