Since nicotine itself is a vascular constrictor it causes the arteries to narrow - it also causes a short-term increase in blood pressure, heart rate and the flow of blood from the heart. I would encourage a check up at the clinic njrockpd if you are thinking about the tightness of chest, inability to breathe by more than just a passing thought. You can try a few deep breathing exercises and see if that helps <sit in a good chair, lift arms out to side inhale as deep as you can slowly, hold it for a count of 1, 2, 3...exhale slowly then repeat counting to 6, relax for a few minutes, then repeat, with arms over your head. This is to encourage the entire lung / chest area to expand, slow control is to prevent hyperventilation, freedom of movement is important, but safety is paramount.>
What mg level are you vaping and is it PG or VG or a blend?
While the lungs can recoup some after damage, they never come back 100%....its my understanding that the tar remains not so much an all over coating, but more so of spots < as seen and heard on Dr. G, Medical Examiner >