I developed incredible pain on my left side approximately mid way on my rib cage about 2 oclock this afternoon.  I dont remember any sudden pain like I cracked a rib or anything. It  seems very localized and intense.  I did go bowling yesterday for the first time in a long time and I lift a lot at work.  I have to take about 6-8 advil to get any relief and hurts to the touch.  Any suggestions as to what it could be?
Dear Sir, Thanks for your question. As you mentioned you had developed incredible pain on your left side approximately midway on your rib cage which was sudden in onset. It seems very localized and intense as per your complained. You went bowling yesterday for the first time in a long time, and you lifted a lot at work. Your pain was that intense that you need to take painkillers frequently. Now as per your history and your presentation of pain, I would say it is very unlikely related to heart. Now there are few possibilities1. It can be muscular pain due to heavy lifting which leads to muscle spasm and causes intense pain2. It can be hair line rib fracture which you might not have noticed and which may or may not be even seen on chest x-ray Wish you speedy recovery