ya if you itch it to much or it gets bad scars can and will happen i got a couple from when i was a kid.
ORIGINAL: YooperMike
Had my first case a couple years ago. Doesn't hardly grow back home in the U.P., but here in IL, its everywhere. Xanfel has worked real well for me. You can get it at drug stores. It is a wash that you scrub vigorously until the itching stops. It takes the oils away. My wife got poison sumac really bad two years ago, has a couple scars actually.