?dermatographia ?: Not sure - dermatographia usually resolves in about half an hour. See: http://www.mayoclinic.org/diseases-conditions/dermatographia/basics/definition/con-20025360 ** On the other hand if your skin is extremely dry - you might be able to leave a mark by scratching through dead skin.
Answered 11/24/2014
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Dermatographism: Dermatographic urticaria (also known as dermatographism or "skin writing") is a skin disorder seen in 4–5% of the world's population and is one of the most common types of urticaria, in which the skin becomes raised and inflamed when stroked, scratched, rubbed, and sometimes even slapped. There are some treatments, including treatment by substances (i.e. an antihistamine) which prevent histamine from causing the reaction
Answered 11/24/2014
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