US$ 27.65
substances found in tobacco Cigarette Tar Smoking - BBC Bitesize
Description
Smoking clogs up the arteries and veins of your body which, apart from dramatically increasing your risk of heart disease (3), stops your skin from getting the oxygen and vitamins it needs to rejuvenate properly
BOX 175 KENSINGTON STATION, BROOKLYN, N.Y

As to the tightness in your chest, I'm obviously no doctor, but I wonder if it might have to do with nicotine since nicotine is indeed a stimulant and presumably could increase bodily tension

Its mostly about upkeep
