What causes the breasts to become smaller?

Breast size reduction may be caused by various factors, with the most common being mammary gland atrophy. Mammary gland atrophy refers to the shrinking and reduction of breast tissue, leading to smaller breast size, sagging, loose breast skin, and laxity of internal breast tissues. Major causes of mammary gland atrophy include medical conditions such as fibrocystic breast changes, mastitis, and breast cancer, as well as physiological changes during menstruation, lactation, and menopause. Breast trauma, surgery, medication side effects, and malnutrition may also contribute to reduced breast size. If symptoms of breast shrinkage occur, patients are advised to seek timely medical evaluation to determine the underlying cause and receive appropriate treatment accordingly.