High risk groups for breast cancer: 1. Early menarche; 2. Not married after 30 years old, not having children after 35 years old, not married for life. 3. Late age of menopause. Li Qiang of the Department of General Surgery, Zhujiang Hospital, Southern Medical University 4. First-degree relatives with a history of breast cancer 5. 6. Excessive nutrition, obesity and fatty diet can enhance or prolong the stimulation of estrogen on breast epithelial cells, thus increasing the chance of development. The above are only high-risk factors. People with the above conditions do not necessarily have to develop breast cancer, so there is no need to be nervous. This is just as a medical knowledge that everyone is concerned about. If you have 2-3 of the above conditions, there is no need to be nervous, just go to the hospital regularly to see your doctor.