SkinEvidence check
Raised Welts When You Scratch? What Studies Show on Skin Writing
If a light scratch leaves a raised, itchy red line within minutes, you may have dermatographism, or skin writing. Symptomatic dermatographism affects an estimated 2% to 5% of people and is the most common form of hives triggered by a physical cause. In a survey of 91 patients, symptoms were often worse in the evening and lasted about 6 years on average. A review of 23 studies found everyday non-drowsy antihistamines worked well. Here is what to know.











