If any one out there has the answer to my ?? A thank-you in advance. I have had a re-occuring chest pain, on my left side of the body. That is so sever it takes my breath away. It starts slowly and with movement or heat starts to throb. It feels like its right under the pectoral muscle, yet there is cramping on the chest wall. It goes right thru to the shoulder blade and at its peak it numbs half my arm and cause it to tingle, until it subsides. This can last up 15 hours, in pure agony. Went to the er and was tested and heart is great And no blood clots. If it was low potassim wouldn't that effect all my muscles. The pain lasts so long, that my whole left side is very ache and sore, and when I exert effort with it, the pains come back??? Any ideas I would be very thank ful for. I was not working out either due to sever, chronic illness thanks and have a great day! Ww