Dark Black lines under eyes

Re: Dark Black lines under eyes

I tried Cucumbers - didn’t work (I tried for 10 mins each time).
I have 7-8hrs of sleep.
I heard of teabags. But I don’t even drink tea from teabags.
I recently tried Almond oil. Only made my skin soft but nothing else change.
I believe I have enough intake of Iron. Salt? How to tell if I’m taking excessive? How to tell if you dehydrated?

Thanks for all your reply.