Hi, my name is Mike and I have this skin bump on my shoulder . About 2 months ago, I woke up with blood draining down my shoulder and arm , after cleaning, I noticed a small bump on the top of my shoulder. Today, I popped the bump, because it was getting annoying, and I noticed after bleeding a few tissues of blood out, that it was skin formed like a volcano with blood in the middle. I don t know what it is or what to do. It s the same color as my skin: white, except that it is full of blood. Can you help me?