There are many reasons why nipples itch after weaning, and they are analyzed as follows: 1) Dermatitis, the surface of the nipple is not cleaned in time, or the body’s immunity is not good, resulting in dermatitis or eczema, to ensure that the nipple is clean and clean and at the same time apply dermatophytin ointment.2) Nipple allergies, such as contact with counterfeit body milk, or bad quality bras leading to nipple swelling, pain and itching. Remove the irritating factors, and then use the drug anti-allergy treatment. 3, mastitis, milk stagnation to provide bacteria growth conditions, or nipple breakage to provide bacteria access to lead to mastitis, accompanied by nipple itching and swelling, can be infused with anti-inflammatory. If there is pus formation, you can first confine the pus, and then puncture and suction or incision to drain the pus.4. Breast cancer, cancer patients will appear nerve symptoms, such as nipple itching and swelling, need to be actively surgical treatment and postoperative chemotherapy.