I found a lump about the size of a quarter on my leg.  It was hard and did not hurt when I put pressure on it.  It had a small purple dot on it and it was not movable.  This morning I noticed that it was gone. I am concerned because I am a heart patient and I have had six strokes,one heart attack and a congestive heart failure.  I was wondering if there is anything to be concerned about.
Hello, This sounds like a hematoma (bruising under the skin). If it resolved and went away, I would not worry about it.  If you are a heart patient, I would assume you are probably on aspirin or some other kind of blood thinner, which makes it easier for you to bruise. If this recurs, have your doctor perform an ultrasound, which is a quick and non-invasive test. I hope this is helpful.