dermographism

noun

der·​mog·​ra·​phism (ˌ)dər-ˈmäg-rə-ˌfiz-əm 

: a condition in which pressure or friction on the skin gives rise to a transient raised usually reddish mark so that a line traced on the skin becomes visible

called also dermatographia, dermatographism

dermographic

ˌdər-mə-ˈgraf-ik 

adjective