1, infancy and early childhood eat less health care tonic food. 2.Enhance nutrition, strengthen physical exercise, wear appropriate bras, and avoid radiation during adolescence. 3.Arrange the marriage and childbirth period, use less oral contraceptives, keep the nipples clean, avoid trauma, and correct nipple depression. 4. Do a monthly self-examination of bilateral breast, including axillary lymph nodes and lymph nodes above and below the clavicle on both sides, and seek immediate medical attention if there are nodules or nipple overflow. Liu Aihui, Department of Mammary Gland, Beijing Maternity Hospital 5. Promote breastfeeding, breastfeeding after delivery can prevent the occurrence of breast lesions and weaning at the right time. 6, maintain a regular lifestyle, keep a happy spirit, get enough sleep and avoid emotional excitement. 7, eat more fiber foods, reduce high-fat diet, strong tea, and caffeine-containing beverages, and use estrogen replacement therapy with caution. 8.Breast swelling and pain before menstruation can be treated with herbal modulation and western medicine to reduce the symptoms and avoid deterioration of the disease. 9.Patients with breast disease, regardless of age, should have frequent physical examination and breast imaging; women aged 35-40 should have a basic mammogram; women over 40 should have an annual physical examination and a mammogram every 1-2 years; women over 50 should have an annual mammogram and mammogram for early detection of lesions and timely treatment. 10. Breast cancer patients should be operated as early as possible and be re-examined every three months for one year after surgery.