The formation of cancer is a gradual process, and the initial stage is often hidden in the depths of the epithelial tissue and connective tissue, and the cancer at this time is still in the stage of carcinoma in situ, which is not easy to detect, and is often discovered by chance during physical examination.
Cancer formation is a complex process that involves the interaction of many factors. First of all, genetic factors are an important cause of cancer onset. Some people are born with susceptibility genes that make them more susceptible to cancer. For example, mutations in the BRCA1 and BRCA2 genes increase a woman's risk of breast and ovarian cancer.
Secondly, environmental factors also have a great influence on the incidence of cancer. For example, long-term exposure to sunlight increases the risk of cancer;Smoking increases the risk of lung cancer;Long-term exposure to certain chemicals, such as benzene and asbestos, can also lead to cancer.
In addition, lifestyle is also an important factor in the incidence of cancer. Diet, exercise, sleep, and other lifestyle habits can all play a role in the development of cancer. For example, a high-fat, high-calorie, low-fiber diet increases the risk of colon and breast cancer;Lack of exercise may also increase the risk of colon and breast cancer.
Finally, the immune system is also a factor in the onset of cancer. The immune system is an important line of defense against disease, and if the immune system is compromised or weakened, it can increase the risk of cancer.
People who have been exposed to carcinogens for a long time are at high risk of cancer. These carcinogens can be chemicals, radioactive substances, viruses, etc., such as people who have been exposed to chemicals such as asbestos, benzene, formaldehyde, etc., people who smoke, people who have been exposed to sunlight for a long time, and people who have been exposed to radiation for a long time.
Genetic factors are also an important factor in people at high risk of cancer. Some cancers are hereditary, such as breast cancer, colorectal cancer, etc., and if there is a history of related cancers in the family, then the family members are also at high risk.
Poor lifestyle and eating habits are also triggers for people at high risk of cancer. For example, bad lifestyle habits such as staying up late for a long time, irregular diet, overeating, excessive alcohol consumption, and excessive intake of high-calorie, high-fat, and high-sugar foods may increase the risk of cancer.
In the early stages of cancer, the tumour is usually small and has not spread to other sites, making it difficult for doctors to detect it with routine tests.
For example, many cancers in their early stages may only be detected with certain imaging tests, which usually take time and money, and not all medical institutions are able to offer these tests.
Even if doctors suspect that a patient may have cancer, it often takes a series of complex tests to make a final diagnosis.
These tests can take a long time and a lot of resources, and sometimes the final diagnosis is not available. Therefore, in the early stage of cancer, it is easy to be overlooked and missed.
*There is an abnormality. **It is the largest organ of the human body, and it is also the most intuitive "window" to reflect the health status of the body. When cancer cells appear in the body, the condition of ** is often changed, and symptoms such as itching, erythema, and ulcers may appear. These symptoms can easily go unnoticed, but if they last longer and don't go away, they need attention.
Fatigue and fatigue. Fatigue and fatigue are one of the symptoms of many diseases, but in the case of cancer, the symptoms can be more pronounced and persistent. When cancer cells appear in the body, the body expends more energy to fight the disease, which leads to fatigue and fatigue. If you feel tired and weak for a long time and cannot be relieved by rest, you need to see a doctor for a check-up.
Persistent pain. Pain is one of the common symptoms of cancer, but different cancers have different locations and degrees of pain. If you have persistent pain in one part of your body that gets worse over time, you need to be alert if it's one of the symptoms of cancer. Especially for some people with chronic pain, if the pain suddenly worsens or lasts longer, it is necessary to see a doctor for a timely examination.
1.Maintain a healthy lifestyle: Eat a healthy diet, eat less high-calorie foods such as greasy, barbecue, and frying, and eat more foods rich in dietary fiber such as vegetables, fruits, and whole grainsExercise moderately to maintain good health;Don't smoke, drink less alcohol, and avoid overwork and stress.
2.Regular physical examination: Regular physical examination, especially for cancer screening, such as breast cancer, lung cancer, colorectal cancer, etc., can detect signs of cancer early and improve the ** rate.
3.Pay attention to environmental hygiene: avoid long-term exposure to harmful substances, such as formaldehyde, benzene and other harmful gases;Pay attention to household hygiene, keep indoor air fresh, and pay attention to household cleanliness.
4.Control chronic diseases: Chronic diseases such as hepatitis and gastritis can increase the risk of cancer.
5.Maintain an optimistic attitude: An optimistic and happy mood can strengthen the body's immunity and reduce the risk of cancer.