According to Beijing Youth Daily on May 18, 2007, “Sister Lin” Chen Xiaoxu died of breast cancer on May 13, 2007 at 18:57 in Shenzhen at the age of 42. As early as March 2006, Chen Xiaoxu felt unwell and her family advised her to see a doctor, but she never took it seriously. Later, when the pain became too much, she went to the hospital for a checkup and realized that she had breast cancer. Once again, this is a wake-up call for us to prevent breast cancer. With the accelerated pace of modern urban life, women are facing the heavy pressure of life and work, and the consequent negative effect is the neglect of health condition. Among the malignant tumors that threaten women’s health, breast cancer has been ranked as the number one “red-faced killer” in the world. The incidence of breast cancer is increasing year by year worldwide. In the United States, it is the most common malignant tumor among women, accounting for 26% of female malignant tumor incidence and 18% of mortality. According to the latest data from the Chinese Anti-Cancer Association, the incidence of breast cancer in major cities in China has increased by 37% and the mortality rate has increased by 38.9% over the past 10 years, and the mortality rate in rural areas has increased by 39.7%. At present, the exact cause of breast cancer is still unclear, but it is generally believed that the “red-faced killer” favors the following categories of middle-aged women: 1, exposure to various kinds of radiation: the breast is a tissue more sensitive to the carcinogenic activity of ionizing radiation. When young, the mammary glands are the most sensitive to the carcinogenic effect of ionizing radiation during the mitotic activity stage, and the effect of ionizing radiation is cumulative, with the same degree of risk for multiple small-dose exposures as for one large-dose exposure, with a dose-effect relationship. Among the survivors of the atomic bombing in Nagasaki, Japan, the proportion of breast cancer increased significantly, and those who received chest radiotherapy during childhood and adolescence also had an increased chance of breast cancer when they grew up. 2. Family history of breast cancer: A study found that women whose mothers had bilateral breast cancer before menopause had 9 times the risk of breast cancer than the average woman, and the average age of breast cancer in the second generation of breast cancer patients was about 10 years earlier than the average person. Women who have sisters with breast cancer are three times more likely to develop the disease. It is important to emphasize that breast cancer is not directly inherited, but is a kind of “cancer quality” inheritance, and the relatives of breast cancer patients do not necessarily have breast cancer, but are more likely to have breast cancer than the general population. 3. Early menarche and late menopause: The relative risk of breast cancer increases 2.2 times when the age of menarche is less than 12 years old compared to more than 17 years old. The age of menopause is greater than 55 years old, and the risk of breast cancer is 1 times higher than that of those younger than 45 years old. Early menarche and late menopause are the two main risk factors for breast cancer. Epidemiological studies show that the risk of breast cancer is 30% higher for women who have never given birth than for those who have; the relative risk of breast cancer is 3 to 4 times higher for women over 35 years old than for those under 30 years old; the risk of breast cancer is twice as high for unmarried women as for married women. Experts believe that childbirth has a protective effect on the breast, but only for those who had a full-term birth before the age of 30. Recent studies have also found that the risk of breast cancer in women who are not breastfeeding is more than 1.5 times greater than that of breastfeeding women. Breastfeeding has a protective effect on the occurrence of breast cancer, mainly for premenopausal women. 5. Unhealthy lifestyle: Some female white-collar workers who have been engaged in office work for a long time sit more and move less, lack exercise and have less exposure to sunlight. Most professional women due to work, long time tight bra, rare to the breast “loose”; some professional women forced to work under pressure or the pursuit of career success, living a single noble or dink life, not a family, do not want children. These factors are related to mastopathy. 6, unhealthy eating habits: the incidence and mortality rate of breast cancer has a strong relationship with the amount of digested fat per capita. The high income of some company employees leads to a high standard of living, resulting in an unscientific and unhealthy “high-calorie, high-fat” diet, which leads to a fourfold increase in the incidence of breast cancer. In addition, women who drink alcohol regularly are also prone to breast cancer. Studies have shown that a young woman who drinks alcohol 3 to 6 times a week, each time according to 250 ml of beer or 185 ml of spirits, will increase her risk of breast cancer by 30% to 60% in the future. 7, endocrine imbalance: breast cancer is related to the imbalance of human endocrine balance, among various endocrine factors, the most important are estrogen and progesterone. Research results show that estrogen stimulates excessive proliferation of epithelial cells in breast gland, which is an important cause of breast cancer, and the frequent use of hormone products and hormone replacement therapy during menopause can increase the risk of breast cancer. 8. Drugs: Some drugs such as blood pressure drugs like reserpine and phenothiazole and steroids have the effect of increasing the prevalence of breast cancer. Some health products, skin care products and cosmetics contain cancer-causing ingredients and should be used with special caution. In addition, harmful ingredients in the air, residual pesticides on vegetables and fruits have different degrees of carcinogenic ingredients. 9. Mental depression and excessive tension: According to the survey, introversion, long-term mental depression and unhappy early life are important factors leading to cancer. Young urban women face fierce competitive pressure and their spirits are in a state of stress and tension for a long time, leading to emotional instability and lack of peace. These mental factors together with bad life and work style cause further damage to breasts. 10. History of benign breast diseases: According to research, benign breast diseases such as cystic hyperplasia, simple hyperplasia of the breast and breast fibroids may deteriorate into cancer. In addition, women with high breast density and firmer texture; abnormally enlarged breasts in spring; excessive breast fondling when they were underage; filling in the breasts with some inappropriate substances for mammoplasty in order to keep the breasts plump and beautiful in appearance; certain women with special body shape, such as particularly obese above the waist, with waist circumference similar to the hips, or very thin body before menopause are prone to breast cancer. Interventions for people at high risk of breast cancer generally refer to pharmacological interventions. Currently, the commonly used drugs include triamcinolone acetonide, which not only helps to treat the primary breast cancer, but also prevents the occurrence of breast cancer in the other breast, as well as having a menopausal effect. Of course, the most important thing for people with high risk of breast cancer is to strengthen self-examination of the breast and to have regular specialist examinations to detect, diagnose and treat breast cancer as early as possible.