So I posted about this issue 10 days ago. A very small vertical line or spot appeared on my right thumb nail. It was dull in colour. But now after ten days or more..it looks darker and more visible. Last time i posted about it.. doctors said it's normal which was assuring. But now it's more visible now. It's not growing though. In picture, it looks black..but when I actually see it.. but it looks a like small blue line to me in real. Google says..melanoma , skin cancer and what not which is scaring me now.