You can judge whether the milk has passed or not from the symptoms, such as the breasts become bigger, the pain disappears, and the baby can suck out smoothly. 1. Enlarged breasts: For a woman who has just given birth to a baby, her breasts will be enlarged and the areola will become red, and a small amount of milk will flow out if she presses the nipple. 2. Pain disappears: before the milk passes, if the baby sucks, the mother will feel pain, but after the milk passes, the baby sucks again and the pain will be reduced or disappear. 3. The baby can suck out smoothly: If the baby can suck out the milk smoothly, will have a sense of satisfaction when eating milk, and do not cry, it also indicates that the milk has been passed, in addition, if you use the breast pump to suck out the milk can also be sucked out smoothly, it means that the milk is also passed. Most women will have milk secretion in 1~2 days after giving birth, and it is recommended to start breastfeeding as early as possible. If it hurts when breastfeeding, or if there is a hard lump in the breast, it is considered to be a milk blockage and should be treated promptly.