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A member asked:
My skin can become very itchy throughout the day and when i scratch my skin will turn red and welt up this happens every day?
A doctor has provided 1 answer
Welts after scratch: Dermatographism is a condition in which welts (hives) appear after one scratches the skin. There are cells in the skin called mast cells. These cells release histamine when one has an allergic reaction. This is why one takes anti-histamines for allergies. When one has dermatographism, these cells release histamine when they are irritated (by scratching the skin).
Answered 11/10/2015
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