Localized itching can be caused by nipple eczema, skin allergies, chronic inflammation, unhygienic breastfeeding, and mammary gland hyperplasia. The cause of nipple eczema is complex, due to a variety of internal and external factors will lead to delayed metamorphosis, the nipple will show oozing, hypertrophy, itching intense, nipple area sensitivity will recur. Due to the allergic nature of the body, contact with certain foods, drugs and other allergens will cause nipple itching, overflow and other manifestations, through the oral administration of anti-allergy drugs can alleviate the symptoms. Most women do not pay attention to local hygiene during breastfeeding, staphylococcus aureus infection will cause nipple, areola secretion increase, stimulation to the nipple and the surrounding skin will cause itching, improper treatment will form subcutaneous abscess. In addition, hormone level disorders, long-term mental stress, anger and other factors will lead to the emergence of mammary gland hyperplasia. Localized sebaceous gland secretion, exudate increase, underwear texture is poor, the skin can not breathe normally, will also make the local itching aggravated.