I have had a mole on my inner forearm for as long as I can remember.  It is FLAT, REDDISH/Brown, not completely round.  It's kinda tear drop shaped.  It is very small.  2mm from Top to bottom, 1mm wide.  I have been paying a lot of attention to it lately because it's shape is not perfectly round.  I am just really paranoid about melanoma.  I had a dermatologist look at it last June and he quickly glanced and said it was not unusual.   Last week I was on vacation and I had been rubbing the mole as I looked at it.  The next day I noticed the skin over the mole and around the mole was dry and I began picking at it.  The mole never bled.  However, the next day it had a tiny scab over it.  When the scab disappeared a few days later the mole was no longer a dark/reddish brown, but a light brown.  Now I am paranoid that I scratched off the top layer of melanoma.  UGH.  Just a little advice.  It now looks more round and a little smaller than it was.  I am just paranoid that I have scratched it and now concealed a sign that could have been worrisome.  Had it been melanoma, would the color have changed to a lighter shade (since the top layer was scratched off)?