Breast cancer is the most common malignant tumor among women today, why is the incidence of breast cancer so high? Research has found that there are many internal and external factors that trigger breast cancer, but in the end, it all boils down to one thing: estrogen in the human body is at fault. Without it, the ductal system of the breast will not develop and the interstitial vessels will not grow sufficiently, so women will have full breasts and “curves”. Once the estrogen secretion in the body is out of balance, resulting in excessive estrogen secretion and prolonged action, trouble will come —- breast duct epithelial cells from normal development to abnormal hyperplasia under the stimulation of estrogen, there will be the possibility of cancer. The following conditions should be considered as danger signs (common symptoms of breast cancer): 1. painless lump (or localized thickening) in a certain area of the breast with unclear border, hard texture and poor mobility; 2. blood discharge from the nipple; 3. sunken breast skin or orange peel-like changes in the breast skin; 4. nipple retraction, epidermal erosion or eczema-like changes in the nipple or areola; 5. significant enlargement, redness and swelling of the breast High-risk group】 1. Mother or sister who has more than one breast cancer; 2. Women who have never given birth and whose first pregnancy is older than 30 years old; 3. Women who eat too much animal fat and are overweight after menopause; 4. People with certain chronic breast diseases (such as ductal epithelial atypia, papillomatosis, etc.); 5. Women with menarche before the age of 12 or menopause after the age of 55; 6. Women with long-term application of estrogen are more likely to develop breast cancer; 7. Patients with breast cancer on one side have a 5-7 times higher chance of developing cancer in the opposite breast than normal people. Epidemiologists have found that food in areas with a high incidence of breast cancer generally contains a lot of fat and animal protein. For example, American food contains three times more fat and animal protein than Japanese food, so the incidence of breast cancer among Americans is also three times higher than that of Japanese. Postmenopausal women who are obese are prone to breast cancer, and the high-fat “Western recipe” diet often causes obesity. With a standard weight of 70 kg, the incidence of breast cancer increases by 20% for every 10 kg increase in body weight, and the risk of breast cancer increases by 80% for every 10 kg increase in body weight for women around 60 years old. Why is Shanghai the national “champion” in breast cancer incidence rate? To a large extent, it has to do with the improvement of living standard and the change of food structure. Excess fat in the body can be converted into estrogen-like hormone, which stimulates the growth of breast tissue, and the result is needless to say. In addition, a large intake of fat can lead to a decrease in the body’s immune function, giving cancer a chance to take advantage of it. From the perspective of breast cancer prevention, it is still necessary for lesbians to maintain the traditional low-fat, high-fiber diet. Among all industries, athletes have the lowest incidence of breast cancer. They exercise a lot every day, consuming excess fat and keeping estrogen in their bodies at low levels. Nowadays, the standard of living has improved and many women who love beauty are worried about their “premature death of youth” and often take some female health care products, especially after entering menopause, insomnia, nervousness and other symptoms, they are more panic, and friends and relatives often give them health care products as gifts for the purpose of concern. The health care products are often given to them as gifts by friends and relatives out of concern. Many women’s health products on the market now contain a certain amount of estrogen, which is a “two-sided blade” that can prolong a woman’s “adolescence” but can also bring about ductal epithelial cell hyperplasia and even cancer. Many urban women are reluctant to have children or delay childbirth until after the age of 30 because of their intense work pace and body image, which is very unacceptable. This is because it is likely to deprive them of an opportunity to enhance their ability to fight breast cancer. Why? A woman’s first full-term pregnancy can lead to a series of changes in the breast epithelium, making the epithelial cells more resistant to genetic mutations and producing large amounts of progesterone, which is useful for protecting breast health and is the “opposite” of estrogen. Therefore, although pregnancy, childbirth and breastfeeding are hard work, they not only bring lovely next generation to women, but also greatly enhance women’s ability to resist diseases, and the earlier this ability is acquired, the more beneficial it is to prevent breast cancer. To start with children Breast cancer is mainly an adult disease, but it has shown a trend of lower age. Nowadays, children are usually only children, and parents naturally regard them as the pearl of their eyes, so they try their best to give their children more nutrition, not counting the high-fat and high-calorie diet, but also blindly buying children’s food from the market to supplement their bodies, many of which contain estrogen, which accelerates girls’ growth and development. According to statistics, the age of menarche for girls in Shanghai has advanced from 16 to 13 years old. The longer the menstrual history of women, the longer the breast tissue is exposed to the effects of estrogen, and the greater the likelihood of disease. Studies have shown that a year earlier age of menarche is associated with a 20% increase in the likelihood of breast cancer over the course of a woman’s life. Therefore, it is not alarming to say that the prevention of breast cancer should start at a young age. Breast cancer is not a woman’s problem Breast cancer is not a woman’s problem. Can men get breast cancer too? It usually develops after the age of 50. Men with underdeveloped testicles, cryptorchidism and testicular atrophy should pay special attention to this problem; men with impaired liver function have a reduced ability to inactivate estrogen, which can also lead to excess estrogen in the body, causing mastopathy and eventually breast cancer. In addition, some gay men who apply estrogen for the treatment of prostate enlargement or prostate cancer should also be mentioned. The incidence of male breast cancer is very low, only about 1% of the incidence of female breast cancer, but due to the small size of male breast and short lymphatic vessels, cancer cells are more likely to spread. The best time to check your breasts is 9-11 days after your menstrual period, because your breasts are softer and easier to find lesions. Generally, it is more convenient and feasible to perform breast self-examination in the following three situations: 1. in the shower; 2. in front of the mirror; 3. when lying down.