Painful nipples and white stuff are considered to be caused by nipple inflammation. When the nipple is blocked and the secretion cannot be removed, once the bacteria invade, it is easy to cause local infection and form nipple inflammation, resulting in red, swollen, painful nipples and white discharge or pus when squeezed. It is necessary to take oral antibiotic medication, wash the nipple with warm water and keep it clean and dry, and if the symptoms are severe, lavage of the milk ducts can be done. The sebaceous glands around the nipple are rich in sebaceous glands, and when they are blocked from draining, they are prone to bacterial invasion and infection, which can also lead to sore nipples and white discharge when squeezed. It also requires antibiotic medication to keep the area around the nipple clean and hygienic, and try to go to the hospital to have the doctor check the specific situation before treating it.