A 43 year old woman in England has a condition known as dermatographia aka Etch A Sketch condition. The slightest scratch causes her skin to swell allowing her to make designs or words on her body which vanish within an hour. She considers the condition her personal party trick,but there is also an itching that is less than pleasant the accompanies it. Doctors believe it is caused by the surface skin cells releasing histamines in a type of allergic reaction. Trust me if there is itching involved you really don't want to have this particular trick up your sleeve.
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