dermatographia
[ der-mat-uh-graf-ee-uh, dur-muh-tuh- ]
/ dərˌmæt əˈgræf i ə, ˌdɜr mə tə- /
noun Medicine/Medical.
a condition in which touching or lightly scratching the skin causes raised, reddish marks.
Also
der·ma·tog·ra·phism
[dur-muh-tog-ruh-fiz-uh m] /ˌdɜr məˈtɒg rəˌfɪz əm/,
dermographia,
dermographism.