The age of breast cancer injection is usually around 20-45 years old. Breast cancer is one of the common malignant tumors occurring in women’s body, and there is no typical clinical manifestation in the early stage of the disease, which is not easy to be detected in the early stage, and the abnormality is usually detected in the physical examination when doing the breast ultrasound or molybdenum X-ray, and there is no vaccine for preventing breast cancer for the time being at the current level of medical treatment. Women should develop the habit of regular medical checkups in their daily life, and if they find uncomfortable symptoms or hard nodules in their breasts, they should go to the hospital as soon as possible for early detection, diagnosis and treatment. In life, we should develop good habits, avoid smoking, alcohol, spicy and other stimulating food, balanced nutrition, ensure enough sleep, avoid staying up late.