@barterful: Dermatographia, also known as skin writing, is a condition where the skin becomes raised and inflamed when scratched, creating the appearance of drawings or writing on the skin. It is a form of urticaria (hives) caused by an overreaction of the immune system, which releases histamines in response to stimuli such as stress or heat. While dermatographia typically does not pose serious health risks, it can cause itching and discomfort for those affected.