Skin Writing answers...?

according new zealand dermatologic society (nzds), skin writing disease occurs when pressure on skin leads release of histamines, biological agents part of immune system. release of histamines near skin triggers welts in small group of people.
frequency
many people see thin red or white line when press skin. nzds states 5 percent of people have serious reaction qualifies skin writing disease. in smaller group of people, condition occurs contact allergen.
according american academy of dermatology (aad), skin writing disease can begin @ time. affects young adults. once case develops, symptoms can reappear years.

i reading skin writing.. medical condition;;
, wondering if skin writing patients find things written in skin, or if carve things in there skin?? random question, im curious(:

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