Help with dermographism ( skin writing or paper skin )?

I have been diagnosed with dermographism, but i only get it from light touch, like my hair around my face or material on my arms i dont really get it on my body or legs just my face neck chest shoulders and arms, the itching is intense, antihistamines do help but make me drowsy which i hate, does any one else have these symptoms with this skin complaint? most reports i read are from people who suffer welts from quite hard pressure to the skin such as scratches or bumps not a light brush or a single strand of hair. also does any one have any other ways of coping with the itchyness other than antihistamines? thanks in advance