The best time to check your breasts is around the 7th-10th day after your menstrual period, which is equivalent to 3-5 days after the end of your period. Breast examinations are very necessary, and it is best to have them every year, preferably twice a year after the age of 40, when the incidence of breast cancer in women is higher. For women who are not menopausal, the best time to have a mammogram is 3-5 days after menstruation, because breast enlargement is more related to estrogen, and the effect of estrogen on the breast is minimal, and the breast is in a static state, so if there is a lesion of breast disease, it is easier to be detected. If a woman is already menopausal, she can choose any time period to do the examination. If abnormal changes are detected, it is recommended to seek medical attention in time.