Itchy nipples are not usually a symptom of breast cancer, which is more commonly characterized by a lump in the chest. Itchy nipples can be caused by dry skin, eczema, breast hyperplasia and other reasons. 1. Dry skin: Hormone levels change during menstruation, leading to dry skin and itchy nipples. And if you use irritating cleaning products for a long time to over-clean the skin at the breast, it will also lead to dry skin. 2. Eczema: In hot weather, if the skin barrier dysfunction or wearing too tight clothes, it is very easy to rub the breast skin, contact stimulation is likely to cause eczema, nipple itching symptoms are also a skin disease in breastfeeding is more common. 3. Mammary hyperplasia: When patients suffer from mammary hyperplasia, its main symptoms manifested as breast itching, breast pain, etc., and when touched by hand, there are obvious lumps. At this time, patients with itchy nipples may be caused by breast hyperplasia. At the same time, skin allergies, mastitis, eczema-like breast cancer may be manifested as itchy nipples, which need to be carefully identified. Itchy nipples may also be caused by other reasons, it is recommended that the patient consult a doctor in time to identify the cause, and then under the guidance of the doctor for appropriate treatment.