Be alert! 12 conditions that may lead to breast cancer

　　menstruation

　　Early menarche, short onset of regular menstruation, and menopause Late in age, yes breast cancer main risk factors.

　　According to statistics, the risk of breast cancer for women who have their menarche between the ages of 11 and 13 is 2 to 3 times higher than for women who have their menarche after the age of 17. The risk of breast cancer for women who are older than 55 years old is three times higher than that of those who are younger than 45 years old. The risk of breast cancer for women who are younger than 45 years old is only one-third of that of women who are older than 50 years old. Those who have been menstruating for more than 40 years have twice the risk of breast cancer compared with those who have been menstruating for less than 30 years.

　　Other studies have shown that removal of both ovaries before the age of 35 reduces the risk of breast cancer by approximately 60% compared with natural menopause.

　　fertility

　　A large number of studies have shown that late age at first birth, high parity, and low full-term parity are all risk factors for breast cancer. People who become pregnant after the age of 30 are 25 times more likely to develop breast cancer than those who are pregnant under the age of 20. The incidence of breast cancer is five times higher for those who have given birth to 3 to 5 children than for those who have given birth to 1 to 2 children. Women who have their first childbirth after the age of 35 have a three-fold increased risk of breast cancer compared with women who have their first childbirth before the age of 20. People who have given birth have a lower risk of breast cancer than those who have not given birth, but the difference is not significant.

　　Breastfeeding can reduce the risk of breast cancer because the endocrine changes during lactation are not conducive to the canceration of breast epithelial cells.

　　abortion

　　Although this factor is controversial, the views of some experts are worthy of attention: among women who have been pregnant at least once and have a history of induced abortion, the risk of breast cancer is 50% higher than that of other women. This increased risk does not vary with the number of abortions or pregnancy history. Research shows that those who have a miscarriage at a younger age than 18 or older than 30 are 1.75 times more likely to develop breast cancer.

　　diet

　　Factors such as a high-fat, low-fiber diet, a large waist-to-hip ratio, and high body fat content can increase the incidence of breast cancer.

　　Foreign scholars have reported that the risk of breast cancer for those who eat a high-fat, low-fiber diet is twice as high as that of those who eat a low-fat, high-fiber diet. The earlier you gain weight, the greater your risk of breast cancer. Obesity is a risk factor for breast cancer.

　　40% of American women's diet is fat, so they are susceptible to breast cancer. Surveys in cities in my country show that excessive intake of milk and dairy products is a female Risk factors for breast cancer. Fat will increase estrogen and prolactin, thereby stimulating the malignant transformation of breast epithelial cells, so fat has a cancer-promoting effect. Obese postmenopausal women have a much higher risk of breast cancer than thin women.

　　The risk of breast cancer also increases rapidly with the ratio of waist circumference to hip circumference (normally less than 0.87), and has nothing to do with before or after menopause. Postmenopausal women's body fat changes, and increases in body fat body weight and non-body fat body weight increase the incidence of breast cancer.

　　In addition, tall women have twice the risk of breast cancer than short women, mainly because growth hormone has a cancer-promoting effect. Drinking green tea, taking beta carotene, and consuming soybeans and cabbage can reduce body fat and weight, and reduce the incidence of breast cancer. Experts recommend eating less fat, especially saturated fatty acids.

　　family history

　　Studies have shown that women with a first-level family history of breast cancer have a risk of breast cancer that is 2 to 3 times higher than that of normal people. At the same time, this risk is related to the age of onset of breast cancer in family members and unilateral or bilateral lesions. Generally speaking, those with a younger age at onset and a family history of bilateral breast cancer are at increased risk.

　　Tobacco and alcohol

　　Many experts believe that smoking in women is a dangerous cause of breast cancer. Canadian experts pointed out that smokers, especially adolescent women, are at greater risk of breast cancer than non-smokers, with the probability being 2/3 higher.

　　Women who start smoking within 5 years of menarche have a 69% increased risk of breast cancer compared with non-smokers. On the one hand, smoking increases the metabolism of estradiol in the liver, reducing its serum concentration, thereby reducing the risk of breast cancer; on the other hand, the metabolites of smoking directly damage breast epithelial cells, leading to the occurrence of breast cancer. But overall, the role of the latter is far greater than the former. According to reports, carcinogens and auxiliary carcinogens exist in the non-lactating milk of smoking women.

　　ray

　　Radiation is related to the incidence of breast cancer, and its risk increases with the increase in radiation dose.

　　As early as the end of World War II, the incidence of breast cancer increased significantly among survivors of the atomic bombings dropped on Hiroshima and Nagasaki by the United States and Japan.

　　clinical It was observed that the incidence of breast cancer increased in those who received radiotherapy and examinations. The younger you are, the greater the risk of radiation-induced breast epithelial cell cancer. Therefore, follow-up of radiotherapy patients should be strengthened.

　　hormone

　　Long-term estrogen replacement therapy can increase the risk of breast cancer, especially menopausal women who use estrogen replacement therapy for a long time. Some people have found that women whose ovaries have not been removed and who use a total amount of estrogen greater than 1,500 mg have a risk of breast cancer that is 2.5 times higher than that of non-users.

　　Interestingly, experts have found that women who work night shifts for a long time are 1.5 times more likely to develop breast cancer than those who work day shifts. This may be related to the long-term exposure of night shift women to artificial lights, which suppresses melatonin and estrogen in the body, thus inducing cancer。

　　sports

　　Research has found that sports exercise Can reduce the incidence of breast cancer. The mechanism is that exercise can regulate the menstrual cycle and change the production of ovarian hormones, thereby reducing the incidence of breast cancer. Even if their weight remains unchanged, women who insist on moderate-intensity exercise have a significantly lower risk of breast cancer. Those who exercised at least 4 hours a week for more than 12 years, or who exercised at a high intensity for an average of 24 hours a week over 10 years, had a reduced incidence of breast cancer.

　　tight

　　Foreign scholars spent three years investigating and found that wearing tight clothes can easily cause breast cancer. Some people call this type of tights "death undergarments".

　　Data show that women who wear tights 24 hours a day, especially those who wear tights, have a risk of breast cancer that is 125 times higher than those who do not wear tights. This is because tight clothing, including overly tight bras, will compress the lymphatic vessels near the breasts, causing the compressed lymphatic vessels to lose their detoxification function. The toxins in the body will stimulate breast epithelial cells to become cancerous.

　　mammary gland disease

　　Some scholars believe that women with a history of breast lobular hyperplasia, fibroadenoma, or intraductal papilloma are 3 to 5 times more likely to develop breast cancer than normal people, because benign breast diseases can increase the susceptibility to carcinogens or carcinogenic substances. Some experts pointed out that family history of breast disease and reproductive system surgery are also risk factors for breast cancer.

　　psychological factors

　　Mental trauma, family misfortune, withdrawn personality, depression, irritability and other adverse psychological and mental factors are all related to the incidence of breast cancer. These negative emotions often cause mental stimulation and cause psychological stress reactions.

　　If a patient is in a state of stress for a long time, the self-regulation and control abilities will inevitably weaken or even disappear, and the immunity will decrease, resulting in the occurrence of breast cancer. Foreign experts report that women who have experienced mental trauma or life setbacks have a relative risk of breast cancer that is 2 to 3 times higher.