Hi, my skin particularly arms and hands get red-purple marks resembling a bruise when ever I scrape it against cardboard or clear packaging. I work in retail and am frequently in contact with this material. It also occurs if i bump my hand on a cabinet or drawer. Doctor says it is old age and perhaps a lack of vit. d. I have been taking supplements of Vit D and E. and still happens with slightest scrape on cardboard or packaging.