Semi circle lines about an inch below my eyes?

[rtb]

Hi, i'm a 25 year old male and just noticed that I have the semi circle lines about an inch below my eyes but above the cheeks. They aren't eyebags or eye wrinkles, They're just half circles that are more noticeable been light hits them a certain way. I get plenty of sleep, drink a lot of water, and maintained the same weight for a long time. I don't notice people my age or even older with them and would like to know what they might be and how to get rid of them. I may post pics later but just thought I'd check first to see if anyone knew what I'm talking about, thanks!