i have a spot on the inside of my left leg near my groin that keeps forming into a lump every couple of days. deep under the skin, not on the surface. but it has an area that is connected to the surface like a pocket where the skin has stretched from this continuing to happen. it fills with blood. sometimes gets to be about the size of a golf ball before i can t take the pressure any more and then squeeze it and drain it. there is no puss. there is no cyst. it is only a bunch of blood. it s been happening for over a year. my gp keeps trying to tell me it is an abscess. it is not. it is only filled with lots of blood. thick blood. clotting blood and fresh blood mixed in. I can feel it bleed into the pocket and fill with blood sometimes if i chafe too much while walking. recently there was almost 1/8 cup of blood drained before it was empty. and it continued to bleed for 3 days before scabbing over. could this be a tumor of some kind? it is not an infection. there has never been any puss or drainage of any kind other than blood. my gp says that it is not a vericose vein. and there is no obvious large vein close to it. under the skin (not the pocket part) when it is full it feels like it is several inches long. almost like a lymph node swollen and bleeding. and when i squeeze hard it will pop multiple layers of skin to drain lots of blood that is partly clotted. what do you think? and what do i do?