"Can you stop asking me to quit smoking again!" Uncle Zhang quarreled with his wife early in the morning. Uncle Zhang's smoker friend was diagnosed with lung cancer, and Uncle Zhang had been smoking for half his life, so Uncle Zhang's wife was worried that he would follow in the

"Can you stop asking me to quit smoking again!" Uncle Zhang quarreled with his wife early in the morning.

Uncle Zhang's smoker friend was diagnosed with lung cancer, and Uncle Zhang had smoked for half his life, so Uncle Zhang's wife was worried that he would follow in the footsteps.

"I tell you, there are so many smokers in the world. If 100 people smoke, how many people can get lung cancer? Moreover, it turns out that my mother-in-law, who doesn't smoke, isn't she diagnosed with lung cancer. Besides, I know my own body very well, so don't worry."

Uncle Zhang put on an unscrupulous attitude again, and Uncle Zhang's wife was helpless.

In fact, Uncle Zhang's words sound a bit reasonable. There are many people in life, and this is what they think. But is this really the case? Let’s talk about the relationship between smoking and lung cancer today.

1. How many people will get lung cancer in 100 people smoke?

Scientists have done research on this probability issue.

In 2004, the British Cancer Journal published a paper that counted the lung cancer mortality rate of men in different groups of European countries such as the United Kingdom. The results showed that the probability of people who do not smoke was only 0.3% of the time they died of lung cancer at the age of 75, while the probability of those who smoked all the time increased by 50 times; if more than 5 cigarettes are smoked every day, the probability of dying from lung cancer at the age of 75 was 25%.

is equivalent to in every 6 people who smoke, one of them will die of lung cancer before the age of 75. If it shrinks to the amount of smoking, one out of 4 people will die of lung cancer in the group with more than 5 cigarettes a day.

can be seen that among the 100 smokers, 16 may die of lung cancer before the age of 75.

" China Smoking Hazards of Health Report " shows that the number of smokers in my country has exceeded 300 million, and tobacco causes more than 1 million people to lose their lives every year. If effective actions are not taken, it is expected to increase to 2 million people per year by 2030 and to 3 million people per year by 2050.

2. Why do some people get lung cancer if they don’t smoke, but they don’t get lung cancer if they smoke?

Some people say that someone around is a severe smoker and has never suffered from lung cancer in his entire life. How can this be explained?

According to a study published in " Nature-Genetics ", some severe smokers may have stronger DNA repair capabilities in their bodies, which can better adapt to DNA mutation and promptly repair system damage, thereby preventing lung cells from mutating and forming malignant tumors.

But the study also emphasized that although these smokers have stronger DNA repair capabilities, it does not mean that they will definitely not suffer from lung cancer. Moreover, you don’t know if you have this ability.

The Internet popular science celebrity pineapple factor also mentioned: There are many lucky people who smoke a lifetime and cannot get lung cancer, but few people can stay away from their hands.

According to clinical statistics, lung cancers that smokers often belong to squamous cell carcinoma and small cell carcinoma, while lung cancers that do not smokers often belong to adenocarcinoma, that is, malignant tumors formed by cancer of gland tissues can occur in the lungs, breast , colon and other parts.

For more than 40 years, scientists have been looking for the causes of lung cancer for non-smokers and found that potential factors include passive smoking, exposure to indoor radon gas , exposure to kitchen smoke formed by burning coal or other fuels, various air pollution, lung diseases, hormones and reproductive factors, etc.

However, it is still difficult to find the main pathogenic factor of "never smokers suffer from lung cancer". After decades of epidemic research, accurate conclusions have not been drawn.

But it is certain that smoking must be one of the causes of lung cancer. Some studies have found that smoke contains more than 50 strong carcinogens, which are very easy to induce gene mutations. The number of gene mutations in patients with smoking lung cancer is 10 times that of non-smoking patients. These data demonstrate the carcinogenicity of smoking.

3. Remind people who smoke, pay attention to these 4 symptoms

Speaking of typical symptoms of lung cancer, many people will think it is cough. However, cough is a very common disease manifestation. Many old smokers are prone to sputum and cough due to long-term smoking and hyperplasia of the bronchial mucosa.

What are the symptoms that need to be taken seriously for those who smoke frequently?

. Unexplained cough and weight loss

Patients with repeated dry coughs, sometimes mild and sometimes severe, irregular, accompanied by weight loss, should be alert to whether the possibility of lung cancer is possible.

, chest pain

About half of the patients with lung cancer often have chest pain as the first symptom. Early chest pain often shows intermittent dull pain, and chest pain will worsen with changes in position, deep breathing or coughing.

. Continuous blood-slit sputum

Hemoptysis is the second common symptom of lung cancer. When cancerous tissue invades the bronchial mucosa, it can cause blood-slit sputum . Early patients generally have very little hemoptysis, which can last for several weeks and appear intermittent attacks.

. Continuously low fever

The cancer cells in the body need to reproduce infinitely, and an inflammatory reaction will occur on the body. During this period, there will be necrosis or infection of tumor tissues, which is manifested in the patient's body that is repeated and continuous fever. This fever, even if the use of antipyretics, will not relieve it.

4. Smoking is not just your own business

According to the World Health Organization report, more than 8 million people lose their lives due to tobacco every year worldwide, of which 1.2 million non-smokers die from diseases caused by second-hand smoke exposure.

The so-called second-hand smoke, that is, passive smoking, refers to the smoke emitted by other smokers that the group does not voluntarily.

Long-term exposure to the second-hand smoke environment, passively inhaling harmful substances in the smoke. Studies have found that exposure to second-hand smoke will increase the risk of cardiovascular diseases, asthma , chronic lung disease, lung cancer and other diseases, and affect the growth of infants and young people.

-hand smoke is also a disease risk factor that cannot be underestimated. Third-hand smoke refers to residual tobacco smoke attached to the surfaces of clothes, walls, carpets, furniture, and even hair and skin. These smoke cannot be seen or smelled, but it causes harm to the human body silently.

-hand smoke can stay indoors for a considerable period of time, and they still exist 6 hours after extinguishing, and the pollution lasts longer than first-hand smoke and second-hand smoke. If exposed to third-hand smoke environment for a long time, contacts are more likely to have problems such as respiratory system, nervous system, , and circulatory system.

Smoking is a matter for one person, but the harm it brings will pose a threat to a group of people. Maybe you feel relaxed at the moment when you swallow the clouds and spit out the mist, but for the sake of your family and your own health, you may get more happiness than smoking.

Reference:

[1] "How many of the 100 smokers will get lung cancer? The answer will definitely surprise you! 》.Pineapple factor.2018-05-31

[2] "Why do some people have a serious addiction to smoking and have no lung cancer, while others have never smoke but have lung cancer? 》. Popular Science China. 2022-09-18

[3] "One hand smoke harms yourself, second hand smoke harms people around you, and third hand smoke harms others! 》. Medical Cancer Friends Association. 2021-03-20

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