I have this darkness around in my smile lines. However i notice depending on the lighting it either looks a lot worse or is barely noticeable. I've noticed these for a few years and am insecure about it. I use spf everyday and am barely out in the sun so I don't think it's from sun damage. Any ideas on what this is and how i can treat them? Skincare? Fillers? (I am a 19 year old female for reference) I'm a 19 year old female for reference.