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Smoking is a very dangerous habit. It is known to cause cancer of mouth, food pipe, stomach, urinary bladder
also. It causes lung cancer
most of all. You now have a long time infection of the lungs which requires medications if you are uncomfortable to prevent it from getting worse. YOU NEED TO STOP SMOKING. Regarding the swelling in the armpit, it is not classical that Bronchitis
can cause that. Do you blood cell count and haemoglobin
to confirm any infections or other blood problems which can cause swelling of armpits. Get an ultrasound
of the armpits if you need to to confirm what the swelling is.