The loss of pigment is a condition called Vitiligo. Here is a link to MEDLINE (approved by moderators to post) with some info on it from different resources:
[url="http://search.nlm.nih.gov/medlineplus/query?DISAMBIGUATION=true&FUNCTION=searc h&SERVER2=server2&SERVER1=server1&PARAME TER=vitiligo&x=43&y=18"]http://search.nlm.nih.gov/medlinep lus/query?DISAMBIGUATION=true&FUNCTION=searc h&SERVER2=server2&SERVER1=server1&PARAME TER=vitiligo&x=43&y=18[/url]
The scratching that leaves lines could be something called dermatographism. Another word for "skin writing" .
Here's a link to the same website which has a lot of info from various sources for you, including photos ...You have the option of seeing 46 additional links under the encyclopedia section alone.
[url="http://search.nlm.nih.gov/medlineplus/query?DISAMBIGUATION=true&FUNCTION=searc h&SERVER2=server2&SERVER1=server1&PARAME TER=Dermatographism&x=43&y=6"]http://search.nlm.nih.gov/medlineplus/query?DISAMBIGUATION=true&FUNCTION=searc h&SERVER2=server2&SERVER1=server1&PARAME TER=Dermatographism&x=43&y=6[/url]
Hope some of this helps.
zuzu xx
[This message has been edited by zuzu8 (edited 09-20-2003).]
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