Local itching can be caused by nipple eczema, skin allergies, chronic inflammation, unhygienic breastfeeding, and mastopexy. The cause of nipple eczema is complex, as a variety of internal and external factors can lead to delayed metaplasia, the nipple will show oozing, hypertrophy, intense itching, and sensitivity in the nipple area will recur. Due to their own allergic constitution, contact with certain foods, drugs and other allergens can cause itching and overflow in the nipple area, and the symptoms can be relieved by taking oral anti-allergy medications. Most women do not pay attention to local hygiene during breastfeeding, and Staphylococcus aureus infection can cause increased nipple and areola discharge, which can cause itching by stimulating the nipple and surrounding skin, and can form subcutaneous abscesses if not handled properly. In addition to this, factors such as hormone level disorders, long-term mental stress and anger can lead to mastopexy. Local itching is also aggravated when the local sebaceous glands secrete a lot, exudate more, the texture of underwear is poor, and the skin cannot breathe properly.