It is normal to have a small amount of white discharge when you squeeze the nipple. The mammary gland has a secretion function and will have a small amount of discharge through the ducts and nipples of the breast. If there is white discharge from the breast and painful and uncomfortable symptoms in the breast, it is considered to be caused by inflammation of the breast, purulent discharge from the nipple due to inflammatory infection, redness, swelling and pain in the breast, and the need to have the breast duct examined and diagnosed. If there is white discharge from the breast after breastfeeding, it is considered to be the discharge of milk from the milk ducts. Most of the milk that accumulates after breastfeeding will be absorbed through the milk ducts, and a small amount of white discharge is not a big problem.