hi, i wanted to get your insight on this. I have noticed an horizontal straight parallel depression across my thumbnail. like a little valley. but straight. It is directly in the middle of my nail. I have seen many things on the internet about this, but was wanting to see what u thought. I have been pretty stressed lately. Another question is, if its directly in the middle, do you know when approximately this could of happened to my nail? im assuming it takes a couple of months to get to the middle? Just wndering, if this could b from porr diet, stress, or a number of things.. or is this a regular phenemonon.. thanks for any help on this ,, i am adding a link to some pictures of my thumb..
thank you
http://www.flickr.com/photos/59399194@N07/