Hi. I have attached 2 pictures of my right thumbnail. Left one is normal and right one is in which I pressed the nail to show the mark properly. I have marked the spot or line or whatever it is. It's a vertical pink line of 1 mm length under my right thumbnail. It doesn't disappear when I put pressure on nail as you can see in the picture I don't think I have had it 1 or 2 days back..i noticed this today. I thought it could be splinter hemorrhage or something. But this is pink not black or brown. So what is it? Should I be worried? Is it some kind of symptom of a big disease