If you do not breastfeed your child for a long time and do not express the milk in your breasts, excessive swelling of your breasts will affect the continued production of milk. Generally speaking, if you do not breastfeed your child for 4-6 hours, or if the milk in your breasts is excessively full despite the short period of time, you should express the milk in your breasts in time. Breastmilk is the best food for your baby. If you are unable to breastfeed your baby in time for various reasons, or if you are producing too much milk, you need to express your milk, but you should not waste the expressed milk, you should store it in a special breast milk storage device, place it in the freezer or refrigerator for storage, and use it to feed your baby when you do not have enough breast milk.