Normal breast structure from shallow to deep, refers to the normal physiological structure of the breast, its structure is as follows: first of all, the shallowest is the skin around the mammary glands and subcutaneous tissue components, the nipple is located in the middle of the breast position, areola is distributed in the nipple around the periphery of the nipple, it is formed by the melanin around the nipple. Secondly, deeper down are the mammary glands, which are composed of 15-20 lobules in each breast, each of which has a number of lobules, which are composed of follicles and ducts arranged in a grapelike pattern. Finally, deeper down are the ligamentous structures of the breast, and the deepest part of the breast is the posterior interstitial space. In summary, the arrangement and organization of the parts of the breast is complex, and if you experience discomfort in your breasts, you should seek medical attention.