By: lourdes sanchez bayas - Published: Apr 1, 2008 • References: odditycentral
This young woman has a rare skin condition known as dermatographia. This is an immune system skin hypersensitivity that releases histamine which is the chemical (neuro-transmitter) your body produces when you're having an allergic reaction. High levels of histamine cause this woman's blood vessels to dilate and make the vessel walls abnormally permeable and this causes the welts to appear. The welts reportedly last for 30 minutes, giving the young woman time to draw various patterns on her body and then take pictures of the drawings.