I am male 56yrs old. While shaving I sliced a small mole located on the back of neck below hair line.

I am male 56yrs old. While shaving I sliced a small mole located on the back of neck below hair line. That was 7 days ago. It will form a soft scab but will easily break open and bleed. Even water from the shower hitting it will cause it to bleed, my collar rubbing it, etc. The only way to stop bleeding is keep a bandage on it to protect it from bleeding.