I posted something similar to this not too long ago...be very, very careful with the cutting...I'm obsessed with cutting things in general- soap, material, paper, cardboard, my skin....the scars are ugly and there's always the danger of infection, or of course, cutting too deep...I had a nice visit with my therapist and we came up with alternatives to me cutting my skin (hence the soap- which is my favorite- it slices so easily)...anyway- since your obsession is the blood- it might take some very creative thinking to tone down your actions...I suggest you talk to someone ASAP- you might be surprised at how much a professional can help