I. Dietary structure With the improvement of people’s living standard, people’s dietary structure has gradually changed. Our daily intake of too much animal food, fried food, sweets, etc., which greatly increase the risk of breast disease. If women want to stay away from all kinds of breast diseases, they should make adjustments to their diet structure early. Eat more fruits and vegetables, grains, potatoes, reduce animal food, cooking should be less oil, away from frying and sweets, these are important dietary protection measures. Second, mental factors Survey found that: the high incidence of breast diseases in the city, developed areas, highly educated, white-collar women in particular, this is because the above groups of people work under pressure, fast-paced, strong competition, women and men bear and as much pressure, they are very prone to tension, anxiety, depression, impatience, loneliness and other bad emotions, long-term stimulation of bad emotions, the body rhythm is prone to disorders, disorders of the neuroendocrine system. Neuroendocrine system dysfunction. This leads to an imbalance in the internal environment and a decrease in immunity, which can easily cause breast diseases. Many breast disease patients have long-term adverse emotional stimulation or a sudden major blow before the disease. Modern research has shown that people with unfortunate life events, repressed sex life, poor marital quality, loneliness, depression, irritability, sulking, emotional instability and other adverse psychological and mental factors have a significantly higher risk of developing breast disease. Depression, irritability, anxiety and other adverse state of mind can play a role in the brain limbic system hypothalamus, so that the body’s neuroimmunity and endocrine disorders, luteinizing hormone levels can be reduced, estrogen levels relatively high, resulting in the occurrence of breast disease. Therefore, to maintain a relaxed mood, optimistic and positive to cope with and resist the negative events in life, to be able to openly face the blow of various adverse events, is equal to build a natural barrier to prevent breast disease. 3, the age of menarche The rapid development of society, people’s living conditions, the nutritional status of the increasingly improved, unscientific, unhealthy “high-calorie, high-fat” dietary habits, resulting in the development of the breast disease, and the development of the breast disease. Unscientific, unhealthy “high-calorie, high-fat” dietary habits, resulting in early maturation, obesity, early menarche. Some data show that: now the age of girls’ menarche has dropped from the original 16 years old to 12 years old or even earlier, the age of menarche reflects the changes in the body’s estrogen, marking the beginning of the breast tissue exposed to estrogen. The earlier the age of menarche, the earlier the mammary glands are exposed to estrogen, and the higher the chance of breast disease. Fourth, the number of pregnancies and births Breast disease is closely related to the number of pregnancies and births, the first marriage, early childbearing age, multiple births are protective factors for the mammary glands. Early age at first marriage and corresponding early childbirth, coupled with breastfeeding after childbirth, so that the ovaries stop or reduce ovulation, in a dormant state, the body’s level of estrogen in a period of time to maintain a low level, breastfeeding can offset the stimulation of the mammary glands of prolactin, the role of multiple births is also similar to this. In addition, sexual energy releases estrogen levels in the body in a timely manner. A high number of births is also a protective factor for the mammary glands, but only full-term births are protective. The number of abortions, however, is an unfavorable factor. Instead of reducing the risk of breast disease, abortion increases the incidence of breast disease, which is induced by abortion in about 40% of cases. Termination of pregnancy to increase the risk of breast disease is the main reason for early pregnancy, a large number of estrogen, progesterone can accelerate the proliferation of mammary cells, enlargement, in the third trimester, the hormone balance can make these cells mature and differentiated, if this process is artificially damaged, failed to mature and differentiate the cells are very easy to recuperate incomplete. Most abortions are performed during the third trimester of pregnancy, which destroys normal hormone levels, while estriol has not yet been produced in large quantities, so a high number of abortions can increase the risk of breast disease. Therefore, it is very necessary to advocate long-acting contraceptive measures for women of childbearing age, and should minimize unwanted pregnancies and achieve safe and effective contraception to reduce the occurrence of breast diseases. V. Breastfeeding The work pressure of professional women is high, the rhythm of life is tense, and generally late marriage and late childbearing. And the popularity of breastfeeding among these people is relatively low, and the maintenance time is also very short. Some scholars have pointed out that women who breastfeed for a long time are far less likely to suffer from breast diseases than those who do not breastfeed. In order to stay away from breast diseases, late childbearing or lifelong childlessness is discouraged, and breastfeeding should be practiced as much as possible after giving birth. Breastfeeding can reduce the occurrence of breast diseases, because breastfeeding after childbirth is a physiological regulation of the breast, the breast has a protective effect, not breastfeeding the milk in the mammary ducts in the accumulation of storage, blockage of the mammary ducts, milk secretion obstacles caused by the accumulation of secretion caused by the physical impact, as well as secretion of lipid decomposition products within the chemical stimulation can lead to the mammary epithelium of the hyperplasia, resulting in the occurrence of mammary gland diseases. On the other hand, prolonged breastfeeding after delivery can delay the establishment of ovulation and thus reduce the risk of breast diseases. The protective effect of breastfeeding was found to be more pronounced in women who had been breastfeeding for more than 2 years cumulatively. Therefore, strongly advocating breastfeeding also has a certain role in promoting the prevention of breast diseases. Sixth, gynecological diseases Gynecological diseases generally refer to irregular menstruation, ovarian cysts, uterine fibroids and so on. By comparing those who suffer from breast disease without gynecological disease with those who suffer from gynecological disease at the same time, it is found that the prevalence rate of the latter is significantly higher than that of the former. Mammary glands and uterus have the same target cells, when various reasons lead to endocrine disorders, estrogen secretion disorders, will affect the mammary glands and reproductive system at the same time and cause gynecological diseases and breast hyperplasia. Menstrual disorders are the most common manifestation of endocrine disorders. Once the endocrine dysfunction, plasma estrogen levels can be increased, resulting in continuous stimulation of target organs, coupled with a certain part of the breast tissue is excessively sensitive to hormones, may be the cause of benign breast disease. Seven, lifestyle habits 1, smoking and drinking Many modern young women to smoke, alcohol as “fashionable”, like the feeling of smoke curls, perhaps this feeling allows many women to get satisfied, but ignored their own health. Cigarettes contain nicotine, this substance is very harmful to the human body, Professor Johnson and other research results show that active smokers with breast cancer risk increased by 46%. The harm of alcohol should not be underestimated, drinking alcohol more than 3 times a day, the risk of women suffering from breast cancer will increase by 50% to 70%. 2, corset Modern women are pursuing the perfection of the chest, and corset underwear is highly recommended by manufacturers of products, many women have been advocated, but also crazy in love with the corset underwear. Women wear up corset underwear, is indeed very good-looking, but a long time will find in each period before the breast is very painful. That’s because the corset underwear is too tight, and women’s breasts in the long-term wire under the torment, simply can not breathe, blood flow is not smooth, naturally, will feel the swelling and pain. Especially in the developmental period of women, underwear is not through the tight, otherwise it will easily lead to maldevelopment and breast deformity. 3, excessive sunscreen Sunlight, vitamin D, folic acid and other protective factors may be breast cancer. A study found that in adolescence, if you can often contact with the sun, the risk of breast cancer throughout their lives have a reduced role. Animal studies have shown that calcium and vitamin D can reduce breast cell hyperplasia associated with high-fat diets. However, today’s knowledge of women from childhood buried in hard work, adults sit indoors daily work, exposure to sunlight is too little, and generally keen to apply sunscreen, and sunscreen factor SPF18 or more sunscreen will affect the synthesis of vitamin D in the skin. Eight, drugs female friends are very beautiful, very important body health, as long as the beauty, beauty related cosmetics, health products, they are willing to try, but do not know, many diseases are triggered by the abuse of cosmetics and health products. The use of estrogen-containing cosmetics and health products can make women’s body estrogen level is high, luteinizing hormone secretion is reduced, the amount of estrogen is relatively increased, so that the body luteinizing hormone and estrogen ratio imbalance, stimulating breast hyperplasia. Contraceptive pills are widely accepted as simple, convenient and economical to use, and studies on whether it is a risk factor for breast diseases still have different conclusions. Some scholars believe that long-term use of oral contraceptives increases the risk of breast disease in women by 1.7 to 4.1, and WHO multi-country studies have shown that the risk is 1.3 to 1.5, and that breast cancer associated with oral contraceptives occurs more often at the age of 40 to 50.