Itchy nipples are considered to be caused by dry weather, breast eczema, breast hyperplasia, inflammatory breast cancer and so on. 1. Dry weather: when the weather is too dry, the skin will also be dry, which may lead to localized skin itching and peeling. 2. Breast eczema: the specific cause is not clear, may be related to external or internal causes, is a chronic inflammatory, sexual skin diseases often lead to localized skin itching, rash. 3. Breast hyperplasia: including physiological breast hyperplasia and pathologic breast hyperplasia, often leading to endocrine level disorders, may also be accompanied by nipple itching. 4. Inflammatory Breast Cancer: It is a special type of breast cancer with rapid development, the specific cause of which is not clear, which may lead to local skin redness, swelling, heat and pain, and accompanied by itching. Itchy nipples may also be caused by other reasons, it is recommended to go to the hospital in time, after the cause is clear, targeted treatment.