question: i have kinda lumps behind my ears not just one but often come in a pack always filled with bloody puss they don t hurt if i dont try to pop them but always had this and now im kinda worries / also i have a lump right above my butt crack it moves around if i touch it hurts when i do sit ups had it for quite a while now . i wonder if any of this had to do with cancer or if its just a reaction to greasy skin behind my ears and the lump on ly lower back is worring enough please help