Concave Lines Near Mouth?
Im a 20yo male. Recently I noticed I have 1cm long concave lines extending towards my chin in both corners of my mouth. There are no actual fine lines, just an indentation. I didnt include a picture because they arent extremely noticeable yet but I obviously want to stop them from getting worse. I dont smoke, use straws, etc so I am not quite sure what could be causing them. However, I am quite underweight(~30lbs). Could lacking facial volume due to being underweight cause something like this?