Breast clogging is a hard, swollen and painful feeling due to the lack of blood flow to the breasts. It occurs in breastfeeding women, too much milk accumulates in the breast, can not be discharged caused by the following reasons: 1, excessive nutrition during breastfeeding, too much milk, after feeding too much milk did not get emptied caused. 2, breast inflammation. Please empty your breasts in time and avoid excessive nutritional intake.2. Mammary gland inflammation. Bacterial infection of the milk ducts and the production of pus, the collection of milk can not be discharged, resulting in ductal gap infection. You should use anti-inflammatory and anti-infection drugs to actively treat the infection, and stop breastfeeding during this period. 3, breast compression, breast duct compression, breast discharge channel obstruction, too tight corset, or sleeping position is not correct may lead to breast compression, you can delay the time of wearing corset or wear a looser corset.