White pustules on the nipples are considered to be a septic symptom caused by hair follicle infection. The main reason is that the nipple is not cleaned in time, the hair follicle is blocked, and the infection is caused by bacterial invasion. You can use a sterile syringe needle to disinfect and drain the area, and then disinfect and keep it dry. It is also considered to be a blockage of the breast ducts, breast secretions can not be discharged, stagnant in the subcutaneous formation of white bags, but also easy to bacterial invasion led to infection, you can fracture drainage or do lavage treatment of the breast ducts. If the pus is large, sebaceous cysts should also be considered. This is caused by blockage of the sebaceous glands and the inability to secrete sebum. Pay attention to good nipple hygiene, keep the area dry, wear breathable, soft cotton underwear and change it often. Try to go to the hospital and let the doctor check.