Sorry if it's TMI but I am in quite a bit of pain! Got in the bath tonight and noticed that I had a huge spot on my upper arm (arm felt funny all day!) - didn't really have a head, just more of a huge lump. Of course I tried to squeeze/pop it but only blood is coming out and it is unbelievably painful. I've tried hot compress but still nothing - lump is about size of 10p piece but quite deep under the skin. The whole area is really painful and red and is just throbbing .. Does it sound like it's infected, or just a really deep spot? Thanks in advance for the Spot Advice!