Hey, I m randomly getting cuts and red marks on my arm. One minute their not there then the next it is. The other day at work I was standing with my arms by cross and I felt sharp then I saw two scratches on my wrist. I don t even wear jewellery or anything. Today I was looking at my arm then I saw a red line which looks like a scratch or a marking of where someone has grabbed me. I thought it was where my mate grabbed but I remembered she grabbed my bicep not my forearm. I don t know how I am getting them and you might think its because I have nails but I don t have any as I bite them. So do you know what s happening?