Hi, I have a throbbing or the pain like someone punching in the chest that lasts for a few seconds and goes away. It comes suddenly and goes away in a very few seconds. Pain sometimes comes in the left part, sometimes in right part and sometimes in the central part of chest, it is not localised. Pain does not come on exertion. But when the pain comes, it comes only a very minute region which can be pointed by a finger. I have had ECG and 3 2d echoes' and doctors' told all reports are normal. Please help me what I can do to find out the cause of my pain.