Patients with previous breast cancer or history of benign breast tumor; 2. Those with family history of breast cancer, especially one of the first-degree relatives (mother, sister); 3. Those who have had breast cancer and those with breast cancer-related gene mutation. Women who have never had children or whose first pregnancy is older than 30 years old have a slightly increased risk of breast cancer; 5. Women who eat too much animal fat and are overweight after menopause; 6. Women with certain chronic breast diseases (such as atypical ductal epithelial hyperplasia, papillomatosis, etc.); 7. Women whose first menstruation is before the age of 12 or whose menopause is after the age of 55; 8. Women who apply estrogen to control Women who apply estrogen to control menopausal symptoms will have an increased risk of breast cancer after many years; 9. Those who are depressed, anxious or under stress at work.