The breast will become smaller after weaning, mainly because the breast will be filled with milk locally during lactation, which will increase relatively in appearance, while the breast tissue is mainly composed of mammary ducts, mammary lobules and most adipose tissue, so the breast will increase correspondingly. After weaning, it is normal that the breast will become smaller locally because there is no milk filling in the mammary duct. It is not normal to strengthen local breast care after weaning. It is necessary to regularly check whether the breast has lumps, pain and redness. It is recommended that women have a local breast examination every 1 year.