You can empty the breast milk by baby sucking or using a breast pump. 1. Baby sucking: Clean your breasts and nipples with warm water before breastfeeding, take a comfortable position for breastfeeding, let your baby suck on the nipple, and change to the other side after sucking on one side. When you feel that your breasts are soft and not full, it means that you have emptied your breasts. 2. Breast pump: clean the breasts and breast pump, fit the breast pump to the breast, choose the right pressure so that the breast pump can suck out the milk without making the breasts feel pain, empty one side and then change to the other side. Until both breasts become soft and not swollen. In addition to this, you can also drain the milk by massaging and squeezing with your hands. Therefore, no matter which method you use, if your breasts are soft and do not feel full after the operation, it means that the milk has been emptied.