The reasons why people develop cancer, although complex, are none other than the following three:

Genetic factors Many cancers, such as liver cancer, lung cancer, prostate cancer, etc., have family heredity, and those with family genetic history should be especially vigilant. Generally speaking, those above 40 years of age should be examined diligently, and early detection and early treatment should be carried out, so that they can have peace of mind without any disease. The year before last, I heard a doctor in a hospital in the provincial capital tell an example that my father (about 70 years old) suffered from lung cancer and was in the hospital for treatment, and my daughter accompanied and took care of him, and when she heard the doctor say that there was a certain degree of heredity in the family of lung cancer, she had a CT examination, and the result was that she found early stage of lung cancer. There is also a more familiar example around her, her mother and aunt died of liver cancer, as early as 15 years ago, her aunt's son died of testicular cancer, when he was only thirty-three or fourteen years old.In 2016 the town's gastric cancer screening her brother was found to have gastric cancer, but unfortunately it was already at an advanced stage, and he passed away in less than a year.At the end of 2018 the city's healthcare system's lung cancer screening, she was diagnosed with suspected lung cancer, and after six months of observation was diagnosed to have a Surgery.

Second, environmental factors Long-term in high radiation, toxic chemicals, bacteria, viruses and other harmful environment is an important factor leading to the occurrence of cancer, long-term contact with asbestos led to lung cancer, chemical plants near the emergence of cancer villages are typical examples.

Third, personal habits Cancer is the result of the accumulation of long-term bad habits. For example: smoking, drinking, staying up late, eating too high a temperature, high salt, high sugar, multi-flavor diet. Some people say that the main determinant of human life is genetic factors, which can not be denied, but then again, with even better genes, even better physical quality can not withstand their own practice. A neighbor in my hometown is a typical example. He (my brother) died of lymphoma last year at the age of 74. Both of his parents lived long lives; his father died in 2016 and lived to be exactly 100 years old; his mother died ten years ago and lived to be 87 years old. It is reasonable to say that with such long-lived parents and excellent genes, he should live a long life, but it turned out not to be the case, why? In addition to being a kind and generous person, his father did not smoke or drink and lived an extremely regular life. He can not, smoking addiction alcohol addiction are very big, sixty or seventy years old, at least a pack of cigarettes a day, a meal to drink a catty of white wine, but also especially love to eat meat.

I am not a doctor, no professional knowledge and skills, just think about the cases that happened around me, and express my own feelings, as a kind of brick to attract jade, to explore the truth also rely on professionals.

Nowadays, people often talk about "cancer". "Cancer has become a major health hazard. So why do people get cancer?

As we all know, people in the fetal period, cell growth is very fast, initially for the naked eye can not see the fertilized egg, after the October pregnancy, into several kilograms of fat doll. With the growth of age, cell proliferation rate will gradually slow down, to adulthood, slow to basically stop, only in the case of trauma, as well as in the process of metabolism, only to replenish some of the new cells. However, due to some reasons, some cells will undergo "mutation", lose control, and become the same as embryonic cells, proliferating without limit, growing bigger and bigger, resulting in the formation of tumors. Cancer, as it is often called, is a malignant tumor formed by the unlimited proliferation of mutated cells.

What are the causes of cellular malignancy? According to current research, viruses, molds, rays and chemical carcinogens are the carcinogens that cause normal cells to become cancerous, directly causing mutations in the DNA of the genetic material of the cells and the formation of cancerous cells, which then divide and multiply rapidly according to a geometric multiplier, and of course, there are also internal causes, which may be related to heredity and malfunctioning of the immune status of the organism. For example, the British were the first to discover that a chemical substance could cause cancer, such as workers engaged in cleaning the flue, often prone to skin cancer and testicular cancer. When people checked the composition of the flue substance, they found that it was a substance called benzopyrene that was carcinogenic. Later, it was found that a large number of nitrosamines contained in some smoked foods, as well as aflatoxins contained in some moldy peanuts and corn, can also cause tumors.

So, why do some people get cancer and some do not? This is determined by the amount of exposure to cancer-causing factors on the one hand, and internal factors on the other. Research has found that some people are prone to cancer, that is, the so-called susceptible people in medicine. For example, colorectal cancer and breast cancer have the so-called high cancer family; it shows that there is a certain relationship between the occurrence of cancer and genetic factors. A typical example is retinoblastoma. This type of cancer is usually detected within 3 weeks of age and has a more pronounced family history. It has been tentatively demonstrated that the cause is a change in the genetic material. In addition, the aging of the human body and the weakening of the body's immunity are also one of the causes of tumors, so the elderly are a high incidence of cancer.

Thanks. The number one killer of human disease is cancer. With the rapid economic development, the incidence of cancer is also higher. I believe that there are several reasons that cause people to get cancer. One is genetic inheritance. It can be seen from many cases that family members with a history of cancer have a higher chance of getting the disease. Second, environmental pollution. Excessive discharge of industrial waste gas and water, automobile exhaust pollution, rare radioactive metal smelting and other environmental pollution, leading to the occurrence of cancer. Third, food pollution, pesticides, fertilizers, chemical reagents, the excessive use of contaminated vegetables, fruits, food, leading to cancer. Fourth, living habits, life stress, mental and emotional changes are also important causes of cancer. Long-term staying up late, irregular life, overeating and drinking, excessive smoking and drunkenness, long-term depression, narrow-mindedness, mental atrophy, emotional anger and irritability are all likely to suffer from cancer. Therefore, in order to reduce the incidence of cancer, people should make efforts from the above aspects, start from themselves, develop good living habits and pay attention to their own health.

In addition to genetic predisposition, it is also important to have a proper daily routine and to take care of your diet. The environment and the source of drinking water must be taken care of. We have a village with a population of about 2,000 people. Two-fifths of the people live on a slope about three meters high. Three-fifths live on the edge of farmland. The same wells are used for drinking water. Obviously live in the high ground, the water quality is slightly polluted, the proportion of elderly people in their eighties accounted for the majority, the proportion of cancer patients accounted for less. Perhaps the hillside groundwater plays a role. Living in the low-lying farmland side of the previous same well water, but the proportion of elderly people over eighty years old is very small, the proportion of people suffering from cancer by statistics accounted for a lot. Low-lying well water, in addition to pesticides and fertilizers in the farmland caused by infiltration, heavy rains and storms from the high flow of dirty water also stayed in the low-lying for a long time. Such a situation should be taken seriously.

Why do people get cancer?

I am a patient with advanced breast cancer and talk about my experience.

Initially when I had the cancer, it was just a fire boil-like growth on top of my right breast, which later turned into an ulcer that never healed, however, inside a very short period of time, my right breast became hard and somewhat deformed, but it didn't hurt or itch.

Then I was diagnosed with breast cancer, which was definitely a bolt from the blue for me. I didn't believe I could have cancer at all, so I asked many of my fellow patients' sisters at that time, and I heard them say that most of the breast cancers have a hereditary factor in them, but no one in my family had ever had breast cancer.

And the doctor's explanation was that I was 34 years old, not married, and had not breastfed, so that led to the blockage of the milk ducts, and the estrogen and progesterone in my body were higher, and that's why I got breast cancer. At that time, I didn't know anything about breast cancer at all, and I was still puzzled except for the fact that I was still puzzled.

But before I had cancer I had surgery for an ectopic pregnancy, had a gravida, and both in a very short period of time my body went through surgery again and again, hemorrhaging, and scraping the uterus twice, which should have taken a toll on my body as well.

This, coupled with the fact that I had just gone through a very traumatic event at that time and had hit a complete rock bottom in my life, may have contributed to the combination of factors that led to my unfortunate development of breast cancer.

This was my understanding of my cancer, and of course as I learned, realized and understood breast cancer, I learned that some of these factors were indeed major contributors to the fact that I would develop cancer, such as hormone overproduction, and that my hormone expression was all over the place.

And my habits and living condition, I used to stay up late, not eat breakfast, smoke and drink alcohol, I don't know how to control, but then I quit all these bad habits, but I'm not a good patient who listens and doesn't take the cancer seriously, and the late preventive treatments well.

Everyone's body will have cancer cells, because the cancer cells are originally our own good cells sick, only to become cancer cells, why do people suffer from cancer, most people only so that they will suffer from cancer problems in their own body, I think I will suffer from cancer only one reason that is I do not love myself enough.

Cancer is a collective term for a series of malignant tumors, and the main reason why cancer cells appear inside the human body is because of the mutation of the normal cells of the human body. For normal people, the cells usually divide, grow, and then senesce and die, so as to maintain the dynamic equilibrium of the organism; however, if the cells of the body begin to divide and proliferate without any limitation and form new organisms, it means that the cancerous cells appear, thus forming a Malignant tumors.

Nowadays, I believe many people have the feeling that there are more and more cancer patients around them, and they often hear that several people in a certain family are suffering from cancer. Why do human cells mutate into cancer cells? Today Dr. Liu will talk to you about this question.

Why do people get cancer? What are the factors that lead to cancer?

Above, Dr. Liu told you that the main reason why people suffer from cancer is that the normal cells of the human body appear to multiply without limit and form cancer cells, so what factors will lead to the mutation of normal cells? Generally speaking it mainly includes two main categories of factors.

The first category is endogenous factors.Endogenous factors mainly refer to genetic factors; in layman's terms, it means that some people are born more susceptible to cancer, and their normal cells are born more prone to mutation, for example, chromosomal instability, genetic instability, etc., which will make their normal cells more susceptible to mutation and the formation of cancer cells. In this respect, the fact that one person with the same lifestyle habits develops cancer and the other doesn't could be due to genetics.

The second category is exogenous factors.Exogenous factors, as the name suggests, are some of the factors that appear in the process of survival and life after we are born, the most important of which is the factor of living habits, and a lot of bad living habits will make the incidence of cancer increase.

Here Dr. Liu gives you a few examples: for example, a person who hasBad habit of smoking for a long timeThen it'sIncreased incidence of lung cancerThe reason for this is that the harmful substances in tobacco can damage our lung tissues, which over time can easily lead to cancerous changes in the lung tissues.

Another example is that some people are particularlyLikes to eat hot food, and frequent eating of hot food can easily lead to damage to the esophageal mucosa, and constant irritation will cause the esophageal mucosa to proliferate and mutate, and thenIncreased risk of esophageal cancer。

Another example is that some rural elders are always reluctant to throw away some of theirmoldy foodThe frequent use of moldy food will also increase the incidence of liver cancer because moldy food tends to harbor aflatoxin, which is a very strong chemical carcinogen, so it willIt makes the incidence of liver cancer significantly higher.

In addition, the likes ofDon't like to exercise, don't like to eat fresh vegetables and fruits, always have a high-fat, high-sugar, high-salt diet, always stay up late, always sulkand other bad lifestyle habits can lead to higher rates of cancer; and someEnvironmental factors, occupational factors, etc.All may lead to an increased incidence of certain cancers.

Among the endogenous factors and exogenous factors thatThe dominant factor is still exogenousThat is to say, the vast majority of cancer occurrences are still related to our acquired habits and other factors.

So what should we do to prevent cancer?

For endogenous factorsHere Dr. Liu suggests that if 2-3 people in the immediate family have the same type of cancer, then there needs to be a high suspicion of familial predisposition to cancer, and at this time it is recommended to always do a good job.Regular annual medical check-upsFor example, if you have lung cancer in your family, you should pay attention to focusing on chest CT examination to screen for early lung cancer; if you have breast cancer in your family, you should focus on checking the breast during physical examination to screen for breast lesions. At the same time, those who have the conditions can also undergogenetic screening。

And as for exogenous factors.The main thing is to have good habits.For example, the World Health Organization (WHO) has put forward five recommendations for cancer prevention through reasonable living habits, namely: minimizing animal fat intake; increasing crude fiber intake; reducing meat consumption; increasing fresh vegetables and fruits; and avoiding obesity.

Then Dr. Liu believes that, in layman's terms, it is necessary to quit smoking, limit alcohol consumption, eat less pickled food, eat a healthy diet, control body weight, exercise more, maintain a positive and optimistic state of mind, and at the same time, pay attention to environmental protection, pay attention to the identification of cancer-causing and cancer-promoting agents in the environment, and strengthen the occupational protection and so on.

Overall, the occurrence of cancer is the result of a combination of factors, the family if there are people suffering from cancer, we do not have to worry too much, remember to maintain regular medical checkups, develop healthy living habits, and actively exercise exercise, as long as we can minimize the acquired cancer-causing factors, then the chances of suffering from cancer is certainly reduced to a minimum.

Why do people get cancer, this I have done research, of course, we are not doctors, nor experts, will not study what cell cancer and other profound studies, we can only start from the people and things around us, and strive to come up with the most simple reason.

My subject's grandma and grandpa all have throat cancer successively to the world, the old two don't smoke, don't drink, very hardworking, live in a mountainous and beautiful mountain village, behind the house there is a gurgling brook, they drink water from the brook all the year round, cooking, drinking tea are, surrounded by trees, is a natural oxygen bar, according to the saying, this is how many people in the city envy of the life, living in such an environment, don't live 100 years old, at least have to live more than 90, but the fact is that both did not live past seventy years old, but the fact is that both the elderly did not live past seventy years old. At least have to live more than 90 it, but the fact is, the two old people double did not live past seventy years old.

After my research, I found that the elderly couple had the following characteristics, which were most likely the triggers of throat cancer.

One: the old couple both like heavy flavors. I've eaten their cooking, it's like a salty salt meeting, snore to death, put a little less salt, they say there is no flavor. And they also eat pickled radish head, pickled cucumber, pickled peppers and other pickled products all year round. Secondly, they burn firewood for cooking. The kitchen, bedroom (sleeping kang), dining room, and living room are all in one house, and there is no exhaust fan, so the prairie smoke from burning wood and the oily smoke from cooking can't be dispersed, and they are all stifled in the house. They ate in this environment, and the long time of smoke and fires was no different from the long time of smoking.

I don't know if these two are cancer triggers. But it is certainly not a coincidence that the old couple lived together for decades and got throat cancer one after another.

Why do people get cancer? This question is not so simple, up to now, human beings have not really completely figured out the causes of cancer, that is to say, there is no definite answer to the question of why people get cancer.

Of course, this does not mean that mankind is ignorant of the causes of cancer. There is still some knowledge and some achievements regarding the causes of cancer.It is currently believed that cancer is the result of a multifactorial combination of factors, both genetic and environmental, and that environmental factors are diverse. In recent years, studies have supported the view that the development of certain cancers is purely a result of random "luck" factors.

The focus here is on environmental factors that we can change to some extent.Compared with genetic factors, environmental factors refer to all factors beyond the genetic level, including exogenous carcinogenic factors such as physical, chemical and biological carcinogens, as well as endogenous carcinogenic factors (individual's immune status, mental factors, etc.). Physical cancer-causing factors include ionizing radiation (radiation, nuclear radiation, etc.); chemical cancer-causing factors mainly refer to various kinds of cancer-causing chemicals, for example, smoking smoke contains many kinds of cancer-causing chemicals; and biological cancer-causing factors mainly refer to microbial infections related to the onset of cancer, for example, hepatitis B virus, hepatitis C virus, human papilloma virus, Helicobacter pylori, etc. These factors can be controlled to a certain extent by the body's immune system, and can also be controlled by the body's immune system. These factors can be avoided or minimized to a certain extent, and we can change and control them, so we should pay more attention to them, as the saying goes, to change what we can change, rather than keep obsessing about those things that cannot be changed for the time being. In this sense, cancer can be prevented to a certain extent.

Nowadays, it is no longer a society that talks about "cancer", because cancer has become a frequent and common disease, and "cancer" has become a major disease that jeopardizes human health. So, why do people get cancer? This question has been troubling human beings, and the medical profession has been exploring it. Up to now, scientists have not yet fully understood the causes of cancer. So far, scientists haven't completely figured out the causes of cancer, but only found and summarized some triggers of cancer in clinical research and practice.

First of all, it is genetic factor, we have heard of genetic mutation, in common parlance, cancer cells are normal cells mutated, constantly divided and proliferated, devouring normal cells, so that the tissues and organs suffering from cancer will lose their original functions, and even organs will fail and die. If someone in a family has cancer in the ancestor's father's generation, that is to say, the gene of the cell has been mutated, then his descendants may have mutable cells lurking in their bodies, and the chances of getting cancer will increase.

Furthermore, environmental factors, our living environment is more or less the existence of some harmful factors to the human body, such as: formaldehyde caused by housing renovation, factory sewage caused by air and water pollution, triggering fluoride, mercury, sulfur dioxide, etc., as well as nuclear radiation, noise pollution, etc., if the long-term exposure to a large dose of intake, will result in the normal physiological environment of the human body's impact on the production of cellular Toxic effects, poisoning or causing cancer.

There are also habits or lifestyle factors, in the case of lung and stomach cancers, which have high global morbidity and mortality rates:

The high risk factor of lung cancer is smoking, and it is now believed that more than 90% of lung cancer is caused by active or passive smoking, and the risk of lung cancer for those who live with smokers and inhale second-hand smoke for a long period of time is 20%~30% higher than that of other people, and of course, under the same environmental factors, the incidence rate of lung cancer for patients with chronic lung diseases is also higher than that of normal people. Of course, under the same environmental factors, the incidence rate of lung cancer in some patients with chronic lung diseases is higher than that in normal people.

The high risk factors for stomach cancer are high salt and lack of vitamin C, as well as Helicobacter pylori infection, which are of course related to poor dietary habits. Eating too salty food for a long time, resulting in excessive salt intake, tends to disrupt the normal environment of the gastrointestinal tract and increase the dependence of carcinogens, leading to stomach cancer. For example, Japanese people like to eat pickled food with high salt intake, and because of their scarcity and high price of fresh fruits and vegetables, it causes vitamin deficiency of people, especially the low-income class, which is the main reason why the incidence rate of gastric cancer in Japan has long been the highest in the world. Eating smoked, barbecued and fried food for a long time and eating leftovers frequently are also one of the causes of stomach cancer, so we should change our bad dietary habits, eat low-salt diet, eat more fruits and vegetables, eat less smoked, fried and barbecued food, avoid leftovers as much as possible, live a regular life, abstain from smoking and alcohol, don't eat and drink excessively, and actively treat gastric diseases and other illnesses, so as to avoid the invasion of cancer.

The occurrence of any disease is a complex process, and the causes of "cancer" still need to be explored and researched by human beings!

The above is only a personal opinion, if there is something wrong, welcome to leave a message, together to discuss.

The authoritative interpretation of Pharmaceutical Affairs, unauthorized reproduction, plagiarism will be punished.

1, usually lack of exercise and sports, or excessive fatigue, poor body immunity and resistance, abnormal thoughts and emotions, work and life stress, unbalanced mentality and so on.

2, long-term work in high or low temperature environment, bacteria and cancerous light, air and water quality and other environmental pollution.

3, improper nutrition and diet, smoking and drinking, betel nut, moldy and spoiled food, too much salt, long time eating fried food and irregular diet and so on.

4, cold from the feet, disease enters by the mouth, most human cancers are eaten, the above is my personal opinion for reference only.