There are many reasons for itchy nipples, such as physiological factors, skin sensitivity, nipple inflammation and so on. 1. Physiological factors: Changes in the level of endocrine regulation of the human body can cause physiological nipple itching, such as menstruation, pregnancy, breastfeeding, will cause changes in the level of endocrine regulation of the human body, which will cause stimulation of the breast glands, and therefore nipple itching. 2. Sensitive skin: the patient’s own nipple skin is more sensitive, if you do not pay attention to local hygiene, or wear underwear containing allergic materials, can also cause nipple itching phenomenon, and even cause local redness and swelling. 3. Nipple inflammation: itchy nipples may also be caused by nipple inflammation, accompanied by nipple redness, swelling, hardness, and even inflammatory oozing. At the same time, peri-mammary eczema, eczema-like breast cancer, breast hyperplasia, mastitis and other symptoms may appear itchy nipples. There are many reasons for itchy nipples, if accompanied by uncomfortable symptoms, it is recommended that patients go to the hospital in time to improve the examination, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms and take it lightly.