Yes dermatographism can be passed on via the genetic route to your kids. It can be treated by antihistamines or cromoglicate and sometimes steroids, as they prevent the histamine from causing the reaction. As the underlying cause of dermographism is not known, it can last for many years without relief.
So please get your son evaluated from an allergist.
I hope it helps. Take care and regards.
Thanks for this.... I was stuck out in the sun this past weekend and quickly found out my answer on my own, just got blotches and redness everywhere which in turn caused itching. sunscreen will forever been in my car just in case. One other quick question if you don't mind, my son skin is doing the same thing. he has the "skin writing" red marks, itching same looking rash as me. is this hereditary? or since it is an allergy based condition, could it be something in our house that could cause it, he goes away to college and he said it really got bad when he came home? curious
Dermatographism can be caused by stress, tight or abrasive clothing, watches, glasses, energetic kissing, heat, cold, sunlight or anything that causes stress to the skin. In many cases it is merely a minor annoyance, but in some rare cases symptoms are severe enough to impact a patient's life.
Hence use liberal amounts of sunscreen especially with spf greater than 30 atleast half an hour before going out in sun, avoid the sun, and wear protective clothing.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.