dermatographia since i was about 15 yrs old (22 yrs ago),I remember the doc taking one look at what i could do with my skin…said that’s interesting & put me on atarax(hydroxizine) 4 x a day. my kids think it’s COOL, when they were little they would “write” on me. They are now showing signs…not raised yet like mine is, just red lines on their skin.