I am 22 years old and I recently quit smoking after about 6 years.  After I quit, most of my chest pain that was most likely just from smoking has gone away.  I am still having chest pain on the left side.  I dont notice all of the time, but sometimes it is a dull pain.  Other times I get a sharp pain.  Every now and then I have it on my right side, but usually just the left.  When I breathe deep I can feel a very dull pain.  I get pain in my upper back as well on the left side.  When I have the pain, it seems to pulse somewhat. What is going on?
Thanks for your question on Chat Doctor. I can understand your concern. Since you were a smoker and having left sided chest pain, we should definitely rule out heart diseases first. So get done ECG and 2d echo. If both these are normal then no need to worry about heart diseases. Sometimes undiagnosed stress and anxiety can also cause similar kind of dull left sided chest pain. So consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on its solution. You may need anxiolytic Chat Doctor. Don't worry, you will be alright with all these. Avoid stress and tension, be relaxed and calm.  Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.