The nipple is located in the center of the human breast and is one of the unique reproductive organs of the female population, which has the function of breastfeeding. The nipple is one of the reproductive organs common to both humans and mammals, but for the female population, it is one of their unique reproductive organs and serves the function of breastfeeding. The human nipple is mainly composed of smooth muscle, when it is stimulated, it will cause smooth muscle contraction, resulting in the nipple hardening and bulging phenomenon. Women’s nipples are relatively fragile, and during breastfeeding, inverted nipples, cracked nipples, inflammation, pus, etc. are likely to occur. Therefore, the female population should pay extra attention to the care and hygiene of the nipple area. If patients experience nipple abnormalities or discomfort, it is recommended that they seek prompt medical attention and standardized treatment under the guidance of a doctor.