Why have I got such bad undereye bags?

I'm 18 and have quite bad under eye bags and dark circles. I feel like they've been that was for the past 2 or 3 years but it's possible it's longer and I just didn't think about it when I was younger. I feel like 18 is too young to look so tired and ill, no one else my age seems to look this way and it's so frustrating. I moisturise my face daily and have very clear, balanced skin. Are the eye bags hormonal? Will I grow out of them? And Is there anything that actually works to get rid of them? I'm mixed race so have tanned skin