Hi, I have a very strange symptom that I want to describe and if anyone recognizes this symptom, please let me know. The symptom I experience is pain in the chest area (left side). The epicenter is somewhere between my armpit and my chest but when the pain grows it spreads both downward and upward and even to my back (around my shoulder blade) and arm. The pain gradually develops when I'm physically or mentally active or when I lay down on the bed. It starts with a small tension that I'm able to ignore initially. When the tension gradually increases the pain gets greater. The tension and pain continues to increase until I feel an enormous pain and I feel that my chest/arm want to explode and my arm is about to burst away from my body. The time it takes to get to this maximum point variates between 15-60 min. It's almost like something gets clogged up and thus causes the tension. When I stop the physical or mental activity or sits upright again the tension and pain gradually diminishes. It takes about 5-10 min until I'm recovered.