2. Smokers have poor sleep quality: A study by Johns Hopkins University in the United States found that smokers are still more likely to feel sleepy than non-smokers after waking up overnight. Researchers point out that the reason is that smokers can't get nicotine when they sleep at night. Although they seem to sleep soundly, in fact, their sleep will be disturbed many times and the quality of sleep will decline.
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The bones of smokers are very fragile: it is found that the bone mineral density of female smokers will decrease by 2.3%-3.3% per 10/0, which will greatly increase the incidence of fractures and osteoporosis.
Smoking increases the risk of deafness and blindness: The latest research found that compared with non-smokers, the risk of hearing loss of smokers increased by nearly 70%. A large-scale survey of more than 20,000 men found that smoking also increases the chances of male vision loss. Smoking also increases the possibility of macular degeneration, which is the number one "killer" of vision.