The incidence of breast cancer among women in modern society is increasing year by year, and the reasons for this are as follows: susceptibility factors such as rising body mass index, westernized diet structure, and weight gain before and after menopause, the risk of breast cancer is significantly higher. Family genetic factors, height, users of hormone replacement therapy. Researchers from the American Epidemiological Association claimed through a survey of 62,000 menopausal women that there is a close relationship between excessive obesity and breast cancer, and that an increase in body weight of 30 kilograms will double the incidence of the disease, and that excess fat in the body will lead to a constant increase in estrogen, and that excess estrogen will be esterified and then stored in the adipose tissues, and constantly released into the bloodstream, which will have an effect on the breast tissue, and will cause breast cancer over time. Environmental Factors Environmental Factors A retrospective analysis by the Cold Spring Harbor Research Institute in the U.S. showed that 216 compounds are associated with breast cancer in substances that women come into contact with in their daily lives, and 29 of these potentially cancer-causing substances are produced in large quantities. These compounds are widely distributed in household products such as, cosmetics, gasoline, pharmaceuticals, household products, and other products. Furniture and paints and artificial leather are also evaporating hazardous substances all around us. There was a report on Chen Xiaoxu: Because marble has radioactive substances, the body is exposed to radiation for a long time, which ultimately stimulates the lack of cancer-inhibiting cells, which directly leads to the overgrowth of anisotropic growth cells and the formation of tumors of the endocrine system. Can not say that this is a material factor, but long-term radiation will certainly promote the generation of breast cancer or other tumors. Personal life habits Some women use some hormone replacement drugs in order to delay aging, some women use breast enlargement products containing estrogen for a long time, or do not exercise and take oral contraceptives, etc., which cause endocrine hormone imbalance in the body, which is also a high-risk factor for breast cancer. Age factor The incidence age of breast cancer in Chinese women is around 45-55 years old, and there is a trend of advancement. In many studies by medical experts, it has been found that women with early menstruation and late menopause are more prone to breast cancer, but the overall trend is that the prevalence of breast cancer increases according to age. Mental factors Among the four major global diseases, depression is one of them, according to the latest estimates of the World Health Organization, at present more than 300 million people suffer from depression globally, and China’s depression is close to 100 million people, the United States of America Johns Hopkins public health health research research researchers on the 2017 depressed people to study over a period of 13 years, and the results of the study found that, compared with other women, patients with major depression are more likely to suffer from Breast Cancer. More than 80% of depressed women suffer from various degrees of breast disease, and depressed women are five times more likely to have breast cancer than normal people. This is related to having a stressful life and a stressful job. Birth and breastfeeding factors Having children late, marrying late, not breastfeeding, etc., having children after the age of 35, and not having breastfed or given birth above the age of 40. There is evidence that this is also one of the risk factors for breast cancer. Staying up late, not exercising, smoking, drinking alcohol, and having multiple miscarriages are also associated with breast cancer. Benign Disease Factors The relationship between benign breast disease and breast cancer has been a topic of debate. Benign breast disease is an umbrella term for a variety of breast diseases. They can be categorized as non-proliferative or proliferative according to their risk of cancer, with patients with severe atypical hyperplasia having a higher risk of cancer. Therefore, not all benign lesions are cancerous. Therefore, the next breast cancer patient will not be the result of one cause, but a combination of factors. Stop saying that breast cancer is due to heredity, infertility, late nights, a single cause, it is a combination of multiple causes, working in gangs. There are three ways to detect breast cancer 1. Physical examination Normal physical examination is once a year, so regular physical examination organizations and breast specialty clinics can detect breast cancer at an early stage and give appropriate advice. Therefore, ordinary physical examination combined with breast ultrasonography can detect breast cancer. Self-examination If every woman can know when to check her breasts and how to check her breasts as her doctor does, and if she can detect the problem at an early stage and seek medical treatment in time, it will be a blessing for every family and society. 3.Unintentional discovery Because most of the early breast cancer will not appear pain condition, so in the absence of any abnormal feeling, most women never go to the hospital to check their breasts; and physical examination found breast cancer is also a limited concern for the health of the population. Most of the breast cancers are found on their own and then seek medical treatment, but when they are found, they are already in the middle or late stages of breast cancer! The detection rate of breast cancer by ultrasound in physical examination is slightly higher, in which: breast MRI, mammogram and ultrasound detection rate of breast cancer are: 97.7%, 76.8% and 81.4% respectively. How to perform self-examination? (I) Look Stand in front of a mirror, relax your upper limbs naturally, and observe whether both breasts are symmetrical, whether there is any abnormality in the shape of both breasts, and whether the nipples of both sides are on the same level. Whether the breast skin is sunken or deformed, whether the bilateral breast skin is red, swollen and orange peel, whether the bilateral nipple areola is normal with or without indentation, whether there is secretion and liquid overflow when squeezing the nipple. (ii) Touch, the correct method of palpation: touch the other side of the breast with one hand, the belly of the finger and the palm of the hand at the same level. According to the clockwise direction, from the breast of the upper, lateral, lower, medial, axillary five directions to touch the pressure to touch the swelling, and finally squeeze the nipple with or without fluid overflow, feel the skin under the change (c) press, press if the swelling is touched, press the texture of the swelling is hard and tough, whether it is active. Whether the border is clear, whether the pain. Feel the change of breast tissue deep in the skin. (d) Change, in the same order, the same way, check the other breast. The time for self-examination is recommended for women from post-puberty to childbearing age: 7-10 days after menstruation is cleared for self-examination, as this is when female hormones are in a stable state and have the least effect on the breasts. Menopausal or postmenopausal women: self-examination on a fixed day of the month.