I am a smoker and feels some sensations on back of my body opposite to chest when ever i smoke. please help to know why i have this sensations?

Message from lungs: ...To stop smoking already! if you are getting unusual / uncomfortable feelings from within your ribcage--front or back while inhaling toxic smoke, it is a hint that your lungs are not tolerating that well and you should find a different vice. Cut back # cigarettes until reach zero and symptoms should resolve over time--may be an early bronchitis-type response, which is not desirable.