I am a 25 year old female. Two years back I had noticed a very thin black straight line on my nail in the right hand finger. This line is growing along as my nail grows. Though the line was thin initially, now it has increased in its width and thickness. When I searched in the net about the straight black line on my right hand forefinger, it is showing up as something related to skin cancer or melanoma. I am worried. Should I be concerned about this? I am not very dark, nor very fair. I have wheatish skin. Please advice me. I am attaching a snap of my finger with dark line for your reference.
Also, I used to have three moles on my left hand which had been there since my childhood, but to my surprise two years back they went off easily. I got another very small new mole at a different place on the same hand and that too went away when I scratched it off. Is this something normal?