Mammography is an important examination for women and is usually recommended around 7-10 days after the end of menstruation. During the menstrual cycle, due to the influence of various related endocrine hormones, the breast gland may undergo physiological hyperplasia and rejuvenation changes, resulting in different degrees of congestion and edema in the breast tissue, which interferes with the mammography process. Usually about 7-10 days after the end of menstruation, there is less estrogen in the body, which has less effect on the breast, and the breast is in a normal state, making it easy to check for lesions or abnormalities. Therefore, 7-10 days after menstruation, when the breasts are softer, is the best time for breast self-examination, which is conducive to the detection of nodules and lumps in the breast. In addition, postmenopausal women and men can have a breast examination at any time without choosing a special time for examination. After palpation, if the doctor recommends further examination, further breast ultrasound and mammography can be performed. Women with breast enlargement are advised to participate in regular physical exercise to avoid overexertion. Patients at high risk of breast cancer are advised to have regular breast examinations as recommended by their doctors.