Many patients ask about the causes of breast cancer, in fact, in simple terms, there are only congenital and acquired factors. Congenital factors are genetic factors, such as a mother, sister or blood relative having breast cancer in the family. There are many acquired factors, such as early menstruation, late menopause, late childbirth, short breastfeeding time, long-term use of estrogen containing drugs, supplements or similar health products, obesity, lack of proper labor and physical exercise, irregular life, mental stress, long-term negative emotions, too aggressive and unbalanced mentality, etc.