I'm 15 and I'm going to this junior volunteer orientation thing at the hospital today, and I have to get a TB skin test. I don't have it or anything, it's just that I know they test in on your forearm, and I kinda have scars from when i cut myself when i was going through this dumb phase last year. they just look like faint scratches going across my left arm. I just need to know, do they always test on the left forearm? and also, if they do test me there, will they get mad that i have scratches on my arm and say i'm like, mentally unstable to do the job or something? 