HI I've got a boil on my shoulder. There is no head but it keeps bursting with the slightest pressure. The first time it burst it was just a bump which I scratched. It released some pus then what seemed to be clean blood. This was 4 days ago but it still keeps bursting at the slightest touch, even just fabric of my clothing rubbing it. There has been no further pus since that first time just blood. The blood still looks clean, it doesnt have any streaks and isn't clear/ plasma-ish. It looks fresh and bright. The lump hasnt reduced any at all and is quite painful to touch. But it doesnt look infected, it is only slightly pinker than the surrounding skin. Any idea's what this could be and how to get rid of it?