The glands that produce milk (mammary glands) that are connected to the surface of the breast by the lactiferous ducts may extend to the armpit area (axilla). When a girl reaches puberty, changing levels of hormones cause the ducts to grow and cause fat deposits in the breast tissue to increase. These fill with milk during lactation after a woman has a baby. The milk-carrying ducts extend from the nipple into the underlying breast tissue like the spokes of a wheel. The breast is composed of several glands and ducts that lead to the nipple and the surrounding colored area called the areola. Most breast lumps and other changes are not cancer. Breast lumps, tenderness, and other changes may occur. Some of these changes normally occur during the menstrual cycle, during pregnancy, and with aging. From the time a girl begins to develop breasts, begins menstruating and throughout life, women may experience various kinds of breast pain and other breast changes. Lumps and pain in the breast are common and can have numerous causes.īreast changes are common.
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