Cancer is a major disease that threatens human health, and China is currently facing some cancers that are not very good, such as the increasing incidence of cancer and the rising mortality rate.
According to statistics, there are four million new cases of cancer every year, and half of them die from cancer. Almost every part of the body can become cancerous.
Many cancers have no obvious signs in the early stage, which leads to many people not being able to discover their physical abnormalities in time, thus missing the best time to cause life-threatening conditions. Although the symptoms of cancer in the early stage are not obvious, the human body will still be affected by cancer cells and some abnormal manifestations will appear.
Not all malignancies are cancerous. Although we often refer to "cancer" to refer to malignant tumors, in reality, malignant tumors include many different types, some of which are not what we usually call "cancer".
Malignancy is when cells grow abnormally and form lumps, which often cause damage to the body. Malignant tumors can occur in any part of the body, including **, organs, tissues, and cells. Common malignant tumors include lung cancer, breast cancer, colon cancer, ovarian cancer, lymphoma, etc.
However, not all malignancies are cancerous. For example, leukemia is a malignant tumor of the blood system, but it is not what we usually call "cancer". In addition, some soft tissue tumors, such as sarcoma, are not what we usually call "cancer".
Therefore, in medicine, "cancer" refers to a malignant tumor of epithelial tissue. The epithelial tissue is the outer layer of the tissues and organs of the body, such as the digestive tract, the respiratory tract, etc. Therefore, when doctors refer to "carcinoma", they usually refer to malignant tumors of epithelial tissue.
1.Unexplained wasting
Because the proliferation of tumors requires a large amount of energy and nutrients, our body is always in a state of consumption, which causes symptoms such as anemia and weight loss.
Clinical studies have proven that almost all malignant tumors cause symptoms of weight loss. Therefore, in life, if there is a sudden weight loss for no obvious reason for a period of time, it is necessary to be alert to whether there is a malignant tumor.
2.Fatigue
Many people will find that their physical strength has decreased recently, and they feel more likely to be tired and exhausted, because the metabolites produced by malignant tumors consume the body's energy.
and disrupt normal cellular function, especially feeling tired during some routine activities or feeling weak when performing some tasks that were previously done easily, which may be an important signal of malignancy in the body.
3.Frequent fever
Normal fever will generally recover within two weeks, and the body will develop resistance, basically not frequent fever in a short period of time.
In the case of malignant tumors in the body, there will be local inflammation, which in turn will lead to an increase in body temperature and a low-grade fever. It lasts for a long time and will burn back. At this time, we must pay attention to it, go to the hospital for examination in time, find out the exact cause, and treat the symptoms**.
4.Fatigue and fatigue
Fatigue is another common symptom of having a malignant tumor in the body. Some substances released by tumors can affect the body's energy metabolism and immune system, causing the body to not get enough energy and nutrients, which in turn causes fatigue.
This fatigue usually worsens over time and is not relieved even with rest. If fatigue is accompanied by other uncomfortable symptoms, you should see a doctor as soon as possible.
1.Excessive alcohol consumption
Drinking alcohol is a habit that many people in their lives have. Some people drink a lot of alcohol because they have to socialize because of their work, while others like to drink a lot because of their personal hobbies.
Regardless of the reason, excessive drinking should be avoided as much as possible, because alcohol is very damaging to the human body, easy to lead to over-excitation of nerves, and will cause damage to the gastric mucosa, which is very detrimental to human health. 
2.Heavy smoking
Without the bad habit of smoking, cancer can be effectively prevented.
Nowadays, more and more people are dependent on tobacco, and most people do not pay enough attention to it when they do not have adverse symptoms, and feel that the impact of smoking is not great, but they do not know that this behavior will continue to accumulate harmful substances in the lungs and increase the incidence of lung cancer.
Of course, many other types of cancer are also related to excessive smoking, and it is necessary to understand the harm of tobacco and actively correct bad behaviors in order to improve organ function and stay away from diseases.
3.Lack of exercise
A lazy lifestyle is often accompanied by a lack of physical activity. Long-term inactivity can lead to muscle wasting, decreased cardiovascular function, and slowed metabolism, which can eventually lead to obesity.
Obesity is associated with an increased risk of several cancers, including breast, colon, and uterine cancers. Moderate physical activity not only helps with weight control, but also improves immune system function and reduces the risk of cancer.
4.Staying up late for a long time
Staying up late for a long time does not directly allow cancer cells to enter the body, but it can be one of the factors that cause cancer to appear.
According to a study by British experts on 1,000 cancer patients aged 30 to 50, 99 of them3% have the habit of staying up late all year round.
Science believes that the reason why this is the case is that staying up late will not only disrupt the endocrine and biological clock, but also destroy the formation of melatonin in the human body at night, which not only has the effect of promoting sleep, but also protects the body's immune function.
1. Older people. As we age, the body's immune system weakens and cells become less able to repair and regenerate, increasing the risk of malignancy.
2. Smokers. Smoking is one of the leading causes of many malignancies such as lung cancer. Tobacco contains a lot of carcinogens, and long-term smoking can lead to a decrease in the body's immunity, which increases the risk of malignant tumors.
3. Those who have been in a radiation environment for a long time. If exposed to radiation for a long time, it may cause abnormal growth of cells in the body, which can induce cancer. It is recommended that such people need to pay attention to protective measures in their daily life and avoid long-term exposure to radiation.
4. Those with a genetic history of malignant tumors. Many malignant tumors in clinical practice have significant genetic predisposition, such as liver cancer, breast cancer, gastric cancer, etc. Health science