Dermatographia or skin writing

Someone with dermatographia or skin writing can get raised red welts on their skin minutes after it's pressed or stroked. Clapping your hands, irritation from your clothes or bed sheets -- even sitting -- can cause hives. It's a condition related to the allergies to sunlight and cold. Worry and warm temperatures may make it worse. Antihistamines can often ease the symptoms.

this is only for your information, kindly take the advice of your doctor for medicines, exercises and so on.

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