<s>[INST] I have tenderness -similar to a very tender bruise under my LEFT (not right), breast, and it extends to under my left arm (cancer in lymph nodes?! -hope not). I also got some shooting pains in that area yesterday but today they are gone. I dont feel the tightness of chest described as signs of a heart attack - just the shooting pain thats pretty much gone and the extreme tenderness that persists. I should also add that it feel like theres a kind of numbness all around the left shoulder blade -skin has totally duller sense of feeling than anywhere else. Bad news -Im a long term smoker. My guess is this is an inflammatory repsonse to plaque buildup in my heart valves/arteries. Whta do you think I should do, (besides not smoking)? [/INST] Howell come to ChatDoctorI really appreciate your concern, I had gone through the history given here, I would like to say you that stop getting different weird ideas about the pain that you are having it is not the pain due to what you are thinking, but it seems to be a muscular pain, most of the time it is due to anxiety and stress, so try to come out of this, better to stop the smoking it is not good for health, right now it may not be the cause but better to stop it, hope this information helps. </s>