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why do lines appear around mouths of smokers

asked in medicine, life, Biology

jacquesdor answers:

Because all that sucking in and blowing out creases the skin - look in a mirror and try it. Smoking dries out the skin badly so smokers have more lines generally, but it is the action of sucking that does it, the temporary crease as you suck is likely to become permanent quite quickly.

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robinsamuels answers:

Smoking also damages oral health. Smokers lose their teeth quicker, 10 years on average from memory, and will therefore suffer from bone resorbsion around the gums leading to the well known sucked in lip look.

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jeannebaxter answers:

Sigmund Freud, a cigar smoker, died of mouth cancer.

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goatcompas answers:

The premature aging in smokers is also related to free oxygen radicals (cigarette smoke generates quite a bit in the body). Smokers also tend not to take care of themselves in other ways, such as dental hygiene, exercise, wearing sun protection, proper diet, etc., all of which contribute to the lines and other signs of aging.

I've read that the average IQ of a smoker is about 15 (one sigma) points below non-smokers. It's not that smoking causes stupidity, but that "less gifted" people are more likely to start smoking and have a harder time stopping.

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