What are these multiple vertical lines I have when smiling and how can I get rid of them? (Photo)

I'm only 26 and I have these vertical lines around my mouth that appear when smiling/laughing. They are not like normal laugh lines. I don't know what has caused them. No matter how much I moisturise they never appear to smooth out. I don't know anyone else who has them let alone someone my own age. I'm very self conscious of them and I feel they make me look older. I would most like to know what they are, what causes them and if anything can be done to get rid of them or treat them?