The appearance of white pus spots on the nipple is mainly related to sebaceous cysts, folliculitis, breast eczema and other reasons. 1. Sebaceous cyst infection: due to the sebum secreted by the sebaceous glands of the breasts can not be normally discharged from the mouth of the breast follicles, the formation of cysts, nipples and thus white pustules, usually accompanied by pain, redness and swelling and other symptoms. 2. Folliculitis: Inflammation caused by bacterial infection of hair follicles, after the breast skin follicles are infected by bacteria, white pus spots will appear on the nipple and blood will appear after rupture. 3. Breast eczema: Inflammation caused by various factors, usually manifested as eczema, some people may have white pus spots on the nipple. The appearance of white pus spots on the nipple may also be mastitis, breast tumors and other reasons, it is recommended that the patient seek medical attention as soon as possible, improve the examination to clarify the cause of the disease, and then comply with the doctor’s instructions.