A little itchy nipple is commonly caused by the following reasons: skin lesions, breast tumors, external stimulation and so on. 1. Skin lesions: If eczema, neurodermatitis and other diseases occur in the nipple skin, it will lead to nipple itching. 2. Breast tumor: If inflammatory breast cancer, eczema-like mastitis and other diseases occur, it can lead to nipple itching discomfort. 3. External stimulation: If the nipple is in contact with irritating substances such as silk fabrics, fluffy fabrics, etc., or if there is too much friction or sweating, etc., these factors will have an irritating effect on the nipple, which will lead to nipple itching. In addition, a little itchy nipples may also be mastitis, breast hyperplasia and other diseases, it is recommended that the patient go to the hospital, the doctor will examine the nipple, usually be able to clarify the cause, and then you can carry out the appropriate treatment.