In February 2017, the National Cancer Center published the latest China Cancer Statistics, which estimated the incidence and mortality statistics of malignant tumors in China in 2013 based on malignant tumor registry information collected by the National Tumor Registry in 2016 from various registries across the country. The statistics cover 31 provinces, municipalities and autonomous regions, including 43 highly urbanized cities and towns, 83 medium urbanized cities and towns, and 129 low urbanized cities and towns. The statistics show that breast cancer has become the biggest “red-faced killer” threatening women. Statistics show that the higher the level of urbanization, the higher the chance of breast cancer in women. Although the incidence of breast cancer is very high among women, the cure rate is also very high if detected early. Therefore, it is very important to learn how to self-examine breast cancer. The best time to perform a self-exam is within a week after your period when your breasts are not too tender or swollen. If your period is not very normal, you can perform a self-exam on the same day of the month. Regular breast self-exams are even more necessary for women who are pregnant, breastfeeding, or have had breast implant surgery. How does self-examination work? First look: face the mirror with your hands down and see if your breasts are symmetrical in size, if there are any abnormal protrusions, and if there are any sunken or orange peel-like changes in the skin and nipples. Second touch: Lift the left hand to the back of the head, check the left breast with the right hand, lightly press the breast with the finger belly, starting from the nipple to do a circular clockwise check, gradually outward (about 3-4 circles) until all the breast check is complete, and the same for the right side. Third lie down: lie down with a pillow under your right shoulder, bend your right hand under your head and repeat the second step. Four pressure: In addition to the breast, check for swollen lymph nodes in the armpit and finally squeeze the nipple with the thumb and index finger to note any abnormal discharge. How long is the interval between professional breast examinations? In addition to self-examination, professional examination by a doctor is also necessary. Women aged 20-39 should be examined once a year, and women aged 40 or above should be examined once every six months. Breast Cancer Prevention Tips Supplementing Fish Protein Japanese, Korean and Scandinavian women have a lower incidence of breast cancer, which is related to the frequent consumption of fish. The essential amino acids and OMEGA-3 fatty acids in fish can inhibit the formation of cancer cells, so you can eat sardines, mackerel and cuttlefish regularly. Stay away from high-fat foods If your diet contains a lot of saturated fat, the risk of developing breast cancer will be higher. It is recommended to master the daily diet of meat, cheese, butter and processed foods in the right portion. Wearing the right underwear will make your breasts sag, while wearing too small a size will cause compression and, in serious cases, affect the normal blood circulation and lymphatic flow to your breasts. Women who sleep less than 6 hours a night have twice the risk of breast cancer as women who get enough sleep. 7-8 hours of sleep a night can maintain a normal body rhythm and help reduce the risk of cancer. Breast massage can enhance the elasticity of the ligaments to achieve the effect of firmness and fullness. Usually, you can also do some breast enlargement exercises, which are good for breast fitness. Women who insist on breastfeeding after giving birth can reduce the risk of cancer. In addition to the above tips, internal factors should not be ignored. Genes are the material basis of human heredity, which are functional segments of DNA molecules with genetic effects. All life phenomena such as birth, growth, aging and death of an organism are closely related to genes. Genes are intrinsic factors that influence and even determine human health, and genes associated with the occurrence of diseases are called disease susceptibility genes. Due to the genetic differences between individuals, some people are born with a predisposition to certain diseases, i.e., they carry a predisposition genotype associated with the occurrence of diseases, and when these predisposed people are exposed to adverse factors in the environment, their chances of developing diseases are higher than those who do not carry a predisposition genotype. Therefore, knowing the disease susceptibility genes in a person can help predict the risk of disease occurrence.