The single statement "What are the triggers of cancer? How to avoid cancer?" This topic is too big and too general. In this article, we will introduce the triggering factors of the five most common cancers in China and the ways to reduce the risk of developing them.

I. Lung cancer triggers: smoking, existing lung diseases, environmental factors, arsenic in drinking water, consumption of high doses of beta-carotene supplements by smokers; consumption of 100 grams of red meat per day will increase the risk of lung cancer by 22%; daily intake of 50 grams of processed meats will increase the risk of lung cancer by 14%; and daily intake of 10 grams of alcohol will increase the risk of lung cancer by 4%.

Ways to reduce the risk of lung cancer: The following 8 factors reduce the risk of lung cancer: exercise, high consumption of vegetables, high consumption of fruits, high intake of vitamin C, high intake of isoflavones, and foods containing carotenoids, beta-carotene, and retinol (Vitamin A) can reduce the risk of lung cancer.

II. Breast Cancer Causes: 1. Earlier menarche (before the age of 12), later natural menopause (after the age of 55), not having had children, and the first pregnancy after the age of 30 will raise the total amount of estrogen and progesterone to which a woman will be exposed throughout her life, and will increase a woman's risk of developing breast cancer. 2. Ionizing radiation from hospital treatments. 3. Hormone treatments (which contain estrogen, and progesterone) will increase the risk of developing breast cancer. Those women who take oral contraceptives containing estrogen and progesterone recently or for a long period of time are also at some risk of developing breast cancer.4. Alcohol 5. Increased height in adulthood For premenopausal individuals, the increase in height in adulthood shows a convincing linear increase in the relationship with the risk of developing breast cancer.

Ways to Reduce Breast Cancer Risk:: The following 4 factors reduce the risk of breast cancer 1. 200 grams or more of non-starchy vegetables per day are effective in reducing the risk of breast cancer.2. Carotenoid intake has been associated with a reduced risk of breast cancer.3. A daily intake of 300 milligrams of dietary calcium reduces the risk of breast cancer by 13%.4. Physical exercise reduces the breast cancer risk, and the higher the intensity, the lower the risk drops.

III. Causes of Stomach Cancer: 1. Tobacco use 2. Infections 3. Industrial chemical exposure 4. Consumption of large quantities of salt-preserved foods may be a cause of stomach cancer. This mainly involves pickled vegetables, salted fish and dried fish.5 Excessive alcohol consumption may be a trigger for stomach cancer.6 Excessive body mass index (BMI) and overweight may predispose to stomach cancer.7 Low intake of fruits.8 Consumption of processed meat.9 Consumption of large quantities of barbecued meat products.

Ways to reduce the risk of stomach cancer: 1. Treat Helicobacter pylori infection 2. Consume citrus fruits to reduce the risk of pancreatic cancer

Colorectal cancer causative factors: 1. Inflammatory bowel disease (Crohn's disease and ulcerative colitis) increases the risk of colorectal cancer.2 Smokers have an increased risk of colorectal cancer.3 Every 100 grams of red meat consumed increases the risk of colorectal cancer by 17%.4 Every 50 grams of processed meats increases the risk of colorectal cancer by 16%.5. Alcohol is significantly positively correlated with increased risk of colorectal cancer. significant positive correlation with increased risk of colorectal cancer regardless of the type of alcohol and the dose of alcohol consumed.6 Overweight or obesity: the risk of colorectal cancer increases with increasing BMI.7 Growing taller in adulthood: studies have shown that every 5 centimeters of increase increases the risk of developing colorectal cancer by 5%.8 The risk of developing colorectal cancer increases with every 50 grams of processed meat.

Ways to reduce the risk of colorectal cancer: 1. regular exercise; 2. consumption of whole grains; 3. consumption of foods containing dietary fiber; 4. daily intake of dairy products is significantly associated with a reduced risk of developing the disease; 5. calcium supplements are associated with a reduced risk of developing the disease.

V. Causes of Liver Cancer 1. cirrhosis 2. chronic viral hepatitis is one of the causes of liver cancer 3. long-term use of birth control pills containing estrogen and progesterone increases the risk of liver cancer 4. smoking increases the risk of liver cancer 5. aflatoxin 6. alcohol 7. body fat

Ways to Reduce the Risk of Liver Cancer: 1. Coffee consumption reduces the risk of liver cancer.2 More vigorous physical activity on five or more days per week and a daily fish intake of 20g both reduce the risk of liver cancer to some extent.

I hope the above answer can help you.

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

Cancer is a disease caused by a genetic mutation in the body's own cells, which leads to uncontrollable and rapid cell replication and growth, and the growth of cancerous cells outpaces the elimination of the body's own immune system. In other words, there are several conditions necessary for the formation of cancer:

• The cell has undergone a genetic mutation, and triggers that can cause mutations include chemical ones (e.g., nitrosamines),Physical (e.g., X-rays), biological (e.g., HPV virus), auto-factors ((e.g. obesity), etc.；
  

• Cancer cells have access to sufficient "nutrients" and an environment in which they can replicate and grow;
  

• Low immunity makes the immune system incapable of quickly clearing away mutated cancer cells.
  

These are the same things that trigger cancer.

And while there is no way to guarantee that a person will be 100% cancer free, there are four ways to avoid cancer as much as possible.

1. Stay away from factors that can trigger cancer

1. Physical triggers

• X-rays, such as large doses of ionizing radiation, can alter the genetic structure of cells to induce cancer, so avoid exposure to ionizing radiation and don't have multiple X-rays unless necessary;
  

• Ultraviolet rays, such as long-term exposure to the sun, may raise a person's risk of skin cancer, so daily life should be good sunscreen even if it is cloudy, apply sunscreen, avoid going out when the sun is strong, if you go out to wear sunscreen gear;
  

• Burns, such as excessively hot diets, can damage the mucous membranes of the oral cavity and esophagus at 65°C or above, and if repeated exposure to this irritation raises a person's risk of esophageal cancer, so it is recommended that one should not eat excessively hot foods on a regular basis.
  

2. Chemical triggers

Such as nitrosamines, alcohol, aflatoxin, betaine, formaldehyde, radon, benzene and arsenic. The following points can be done to stay away from these things:

• Eat no or fewer pickled foods, such as Chinese-style salted fish;
  

• Eat no or less fried food, as they are prone to produce 2B carcinogen acrylamide, and fats and oils exposed to constant heat will also produce 1 carcinogen benzopyrene;
  

• Do not eat moldy foods, such as moldy peanuts and corn that contain aflatoxin;
  

• Do not smoke and drink less alcohol, and do not eat or eat betel nut;

• Renovation of environmentally friendly building materials to reduce the source of formaldehyde and other harmful substances, after the completion of the renovation should also be ventilated and absorb formaldehyde with plants such as orchids.

3. Biological factors

For example, viruses and bacteria that can induce cancer, including long-term infection with the HPV virus, which can induce cervical cancer and other cancers, and Helicobacter pylori, which repeatedly triggers gastritis and destroys the gastric mucosa, which may increase the risk of gastric cancer. Long-term infection with hepatitis B virus may cause liver cancer, cirrhosis, and even liver cancer.

Cancer can be prevented by hepatitis B, HPV vaccination, and eradication of Helicobacter pylori.

4. The body's own factors

Obesity is associated with high rates of cancer and it is recommended to keep BMI below 24.

2. Improve body immunity

When immunity is improved, the body will have strong power to fight against cancer cells, and even if a small number of cells become cancerous, the immune system will be in time to get rid of them. Immunity is divided into innate immunity and acquired immunity. Innate immunity, that is, the immunity that our body itself has, is affected by sleep, mental stress, exercise, nutrition and other aspects, and it cannot be obtained by eating something alone, but must be ensured by balanced nutrition, adequate sleep (7-9 hours of sleep per day for adults), and regular exercise (more than 150 minutes of aerobic exercise per week), Low mental stress (can use yoga, music and other ways to reduce stress) to maintain good immunity.

Acquired immunity is the ability of the body to "recognize" a disease-causing microorganism after exposure to it, and when it re-invades the body, the immune system is able to quickly find it and destroy it, thus preventing the person from getting sick. We are actively acquiring acquired immunity by getting vaccinated.

The main vaccines that are currently available for cancer are the HPV vaccine, which helps prevent cancers caused by the HPV virus, such as cervical cancer.

3. Supplement some substances that help fight cancer

For example, substances that can inhibit the activity of cancer cells, such as aspirin medications often taken by people with cardiovascular disease.

4. Screening for early cancer

Some cancers can be screened for in the early stages of the disease, mainly colorectal, breast, skin and lung cancers. There are recommended screening programs for these cancers, and early detection rates are very high with regular screening. Cancer can be prevented from progressing to advanced stages.

The above content is edited and organized by "ask the doctor" for you, want to know more authoritative health knowledge, welcome to pay attention to us!

Let's not get carried away. Let's get down to brass tacks.

Causes of cancer

The usual categorization of cancer triggers is the textbook physical, chemo, and biological factors, which is certainly true. But I'm sure the questioner is not asking about this dead knowledge.

In clinical practice, risk factors are more often used instead of causative factors. Because the occurrence of cancer is very complex, in addition to the cancerous transformation of cells themselves, there is also the role of the immune system, the causative factors of cancer are definitely not only the causative factors of cellular transformation, and this point needs to be clearly differentiated.

In fact, it is not difficult to understand, the more people involved in a matter, the more unlikely that one person to say; the occurrence of disease is the same, the occurrence of cancer involves too many processes, unlike the home boiling water so simple and clear, so it is difficult to talk about what caused the cancer, but more to say what factors increase the likelihood of developing cancer.

Each cancer has specific risk factors that are derived from epidemiologic studies. If the subject wants to ask more specific, contact us by private message. If you want to ask a general question, then generalize a little bit about it.

Take the example of lung cancer, which has the highest incidence in the world (mainly non-small cell lung cancer):

According to medical guidelines published by the National Comprehensive Cancer Network (NCCN), the risk factors for non-small cell lung cancer are:

Smoking, history of lung disease, history of cancer, exposure to carcinogens.

Mainly smoking, the harmful chemicals in tobacco can damage the DNA of the cells in the lungs; if the DNA damage is not repaired, the function of the cells will change in an unpredictable way, and then cancer will occur; if the immune system does not remove the cancerous cells, the cancerous cells will continue to proliferate, and form localized clusters.

The NCCN guidelines state that 85-90% of lung cancer cases are caused by smoking, regardless of whether it's first-hand or second-hand smoke. Smoking is also linked to other cancers such as esophageal, oral, laryngeal, pancreatic, stomach, kidney, and bladder cancers.

The most plausible explanation is that smoke containing harmful chemicals can reach these areas, such as when the smoke spreads to the upper gastrointestinal tract or affects the urinary system via the bloodstream.

Most importantly yes, smoking is a behavior that goes on for years and years, and even if the body has a metabolism, it's hard to compete with a protracted period of active death.

Of course, there are other risk factors in addition to smoking, which are categorized overall intogenetic factor和environmental factorTwo categories. Although the sources are different, they are close in essence: a sustained deleterious effect on the body that ultimately sifts out cancer cells that have the potential to cause cancer.

So, a cancer trigger can be anything that is not conducive to good health, and all we have to do is discover its association with cancer.

How to avoid cancer

• Study of medical knowledge (theoretical basis)
• Reduction of proven bad habits (reduction of risk factors in life)
• Keep away from substances with cancer risk (reduce risk factors at work)
  
• Cancer screening (early detection)

What needs special explanation is that the really scary thing is late-stage cancer, while early-stage cancer is mostly treatable, so we have switched the concept in the question from "cancer" to "late-stage cancer", which is why the last item is "Cancer screening".

As a matter of fact, cancer screening is the most direct means to prevent cancer from becoming overwhelming in real life, but it is still limited by the cancer awareness and screening means of the general public, so this point is not to be over-emphasized.

To summarize, the causative factors of cancer are diverse, and the factors affecting cell carcinogenesis are only a part of cancer occurrence; understanding the risk factors of cancer may be more valuable; cancer prevention, in addition to reducing the risk factors should pay more attention to cancer screening

The truth is that everyone has cancer cells in their body it's just that some people don't get it. I remember a medical professional saying that everyone gets cancer just that those who don't get it don't live as long as they should.

Below I will talk about a little bit of experience on why specifically one would get cancer. First of all, if there is a history of cancer in the family, especially in the blood relatives, these people are more likely to get cancer than normal people, so this group of people should pay special attention to medical checkups and understand cancer awareness. Secondly, I think the irregularity of living for a long time is a very important reason that directly leads to cancer, and there is also the exposure and absorption of various carcinogens, including a large number of long-time consumption, and the deterioration of the living environment, all of which lead to the occurrence of cancer.

There may be many other reasons for the growth of cancer, but I think a person must raise their own immunity, this is very important immunity is to resist all the bad guys, a person can not be too depressing to live to anything a little bit open, do not always angry and moping happy these are great for the body, must pay attention to their own digestive system, I think a person's digestion is very good and normal, generally will not be any serious illness. I think a person's digestion is very good and normal, generally will not get any serious illness.

So I think we don't need to be afraid of cancer, as long as we know correctly regular and happy life will not be a problem, finally I wish you all healthy.