In men, feminization of the breasts, enlargement and flaccidity of the breasts are due to the increase of estrogen in the body, and taking estrogen may be the primary cause of the endocrine system. There are many reasons for women’s breasts to become flabby, such as ageing and obesity, resulting in sagging skin, sagging breasts and loss of shape, which can be treated with breast correction surgery. Breast development during breastfeeding and more milk leads to flaccid breasts. Breast enlargement can seriously affect life, walking, work sports will be affected, not at all beautiful, need to carry out surgery to remove part of the breast tissue, breast reduction. Excessive breast friction and rough pressure can make the breasts swollen, loose and soft, which can lead to pain.