Loose skin and dark complexion are typical characteristics of smokers. Experts say that people who smoke and drink for a long time, especially men, have poor skin color and look darker than ordinary people. Women's skin elasticity drops, becomes thinner, appears slack, spots and wrinkles appear, and seems to be more aging than their peers. Cigarettes contain more than 4000 chemical components, most of which will harm collagen and elastin in human skin. Even secondhand smoke is no exception, which will make the skin lose its elasticity like a rubber band and accumulate many wrinkles. Eyes are not only prone to crow's feet, but also cataracts. The harm of smoking to the eyes is unexpected to many people. People who smoke for a long time already have crow's feet in their eyes, as deep and as long as a knife. This is because when the smoke is filled, the rising heat makes them unconsciously squint, and wrinkles will form after a long time. Smoking not only makes people's eyes "old", but also makes people sick. Many smokers never pay attention, and their eyesight is getting worse and worse. This is because smoking leads to hypoxia in the body, and the retina is particularly sensitive to hypoxia; Tar in cigarettes reduces the content of vitamin B 12 in human body, and vitamin b 12 is an essential nutrient to maintain the normal function of optic nerve. In addition, smokers are more likely to suffer from eye diseases such as cataract, age-related macular degeneration, glaucoma, central retinal vascular embolism and chronic conjunctivitis. Teeth fall off easily and often have bad breath. People who smoke for many years are often ridiculed as "full of rhubarb teeth." In fact, the harm of cigarettes to the mouth is by no means limited to this. Studies have shown that the tooth loss rate of smokers is twice that of non-smokers. This is because smoking stimulates the gums, which is more likely to produce stones and eventually lead to periodontal disease. 80% of patients with severe periodontal disease are smokers. When a smoker opens his mouth, a smell mixed with smoke often comes to his face. No matter what method is used, it is difficult to eradicate this smell, because the oral environment has been destroyed and it is difficult to repair. What's even more frightening is that some surveys have found that 90% of patients with oral cancer are smokers! Experts say that this is related to the toxins contained in cigarettes and the stimulation of the high temperature when burning. Lips are dry and wrinkled. A woman who smokes will never want to have a pair of sexy red lips again, and there will often be a circle of thin wrinkles around her mouth. Experts pointed out that this is caused by excessive exertion of oral muscles when smoking. Coupled with dry skin and poor elasticity, these wrinkles will become deeper and deeper, forming a unique symbol of smokers. Hair is getting less and less. Do you find that you smoke less and less hair every day? This is because the toxic substances in cigarettes will destroy hair follicles, increase androgen secretion, and lead to androgenetic alopecia, which is the main reason for male hair loss in Asia. Breast ptosis, breast cancer. A study conducted by the American Society of Plastic Surgery in 2007 also showed that smoking is an important cause of breast sagging. For smokers, what is more worrying than breast droop is that the survey shows that women who smoke for more than 10 years are more than three times more likely to develop breast cancer than other women. Bones become loose and fragile. Smokers are not only very different from non-smokers in appearance, but also in body. The longer you smoke, the more fragile your bones may become. Some surveys have found that smokers have lower bone density than normal people, and they are more prone to fracture when they are older. Once a fracture occurs, it takes smokers 80% more time to recover than non-smokers. Men don't give women infertility. Smoking and sexual ability are often regarded as the embodiment of masculinity, but as everyone knows, they can't have both. Smoking can lead to sexual dysfunction, which has long been recognized by the medical community. For women, smoking is an important cause of infertility. Burning cigarettes releases a chemical called polycyclic aromatic hydrocarbons, which can kill half of the eggs in a woman's ovary. (Editor: Fan Xuejiao)