Breast cancer is easy to get.

The etiology of breast cancer is still unclear, but it is related to high risk factors: ① abnormal estrone and estradiol and lack of estriol, which are directly related to the incidence of breast cancer;② breast cancer patients in immediate relatives, BRCA1/BRCA2 gene mutation carriers in blood relatives; ② Women with menarche age are young, menopause age is old, childbearing age is late, and lactation time is short;③ Women with benign breast disease history;④ Abuse of estrogen preparations; ④ Excessive nutrition, obesity, high-fat diet, lack of exercise, excessive drinking and other bad habits; Sixth, previous chest radiotherapy. To prevent the occurrence of high-risk factors, breast cancer can be prevented to the greatest extent possible.