Similar question to existing question from someone but I couldn't find the answer to it:-> I have a sensation like air bubble trapped and moving up on the middle side of my chest. To be precise the bubble starts from just above my stomach then practically there's like an sharp few seconds of an explosion kind of feeling right below the middle of my ribcage. For a moment i feel pain but not acute. And in a few seconds to a min or so I come to normal state. I thought it was because of indigestion but I'm not so sure now. This has been happening for a few days now.