In recent years, the incidence of breast cancer in China has been increasing. According to the statistics of the National Cancer Center, breast cancer accounts for the first place of female malignant tumors in the national incidence of malignant tumors. According to experts, women with the following bad habits have a 20% higher incidence of breast cancer than normal women. When you are angry, you will not be able to disperse the gas, which will lead to endocrine disorder and imbalance between estrogen and progesterone, which may lead to lobular hyperplasia and increase the incidence of breast cancer. 2, poor quality cosmetics, hormonal drugs Nowadays, many cosmetics and health care drugs on the market contain estrogen. Women’s excessive supplementation is harmful to the human body. Estrogen is an endocrine hormone produced by women’s ovaries, which can promote female development and maturity, maintain normal menstruation and sexual function. Exogenous estrogen can inhibit the secretion of normal estrogen in your own body, and excessive use is a negative factor for the development of breast cancer. 3. Late night addiction and rest disorder The disruption of sleep rhythm will bring adverse effects on health. The bright light at night will affect the biological clock and lead to disruption of the endocrine system rhythm, thus causing some health problems. Especially under the light, the melatonin content in the body decreases, thus causing a higher risk of breast cancer. 4, overeating and irregular diet If the diet is not regular and quantitative, overeating, eating too fast and too hot, it is a damaging stimulus to the body and has a certain relationship with the occurrence of tumor. 5. Prefer meat and less vegetables People with excessive intake of high-fat food are prone to breast cancer. This is because the steroids contained in fat can be turned into estrogen in the body. Excess estrogen in the body will promote the formation of breast cancer cells. Therefore, the more fat accumulated in the body, the higher the chance of getting breast cancer. Green vegetables, fruits, fresh fish and low-fat dairy products can reduce the risk. 6, stressful, no rest Modern women are under increased pressure in work and life, which is also an important reason for the development of breast diseases. Urban women with high knowledge tend to work under a lot of pressure and get annoyed easily, and the great mental pressure may cause disorders in the endocrine system. It increases the triggering factors of breast cancer. 7. Never check, need to keep in mind Some women say that their breast is always healthy and they have no bad habits, so they never check their breast health. This is very undesirable. Normal women should have a medical checkup once a year, and experts suggest that every medical checkup should be done with breast ultrasound. If you have breast enlargement or breast nodules, you need to be checked every six months. To do early examination, early prevention. 8, sedentary exercise less American scholars research results show that women who exercise 10 to 19 hours a week have 30% less chance of developing breast cancer. Exercise helps prevent the formation of adipose tissue, which can prevent the generation of cancer cells. Therefore long-term fitness exercise, away from obesity, can improve the body.