I just woke up with a lump about the size of a marble about an inch left of my spine, right at the hairline. I\'d been having muscle pain there for a few days, I think due to poor sleep habits. I\'ve found that with some vigorous massage, the lump has already began to reduce. I know a lot of doctors say it\'s a knot in the muscle, so maybe there is some credibility there. Hope this helps.