Generally breastmilk freshness can be put about 48 hours, and should be stored in a special milk storage bag. When the mother can not directly breastfeeding need to express milk in time to store, you can choose the appropriate breast pump, wash your hands before sucking milk, and prepare a clean container. The two breasts need to be alternated when sucking milk, sucked out of the milk to be stored in a special milk storage bag, the general freshness can be stored for about 48 hours, but also pay attention to can not be mixed with other food, to avoid causing contamination. The aspirated milk should not be kept at room temperature for more than 4 hours and can be frozen for up to 6 months. Warm water at about 40°C is needed to rewarm the milk, and frozen milk needs to be thawed before rewarming. Try to consume the milk within 24 hours after reheating, and pour out the remaining milk without reheating it again and again to avoid destroying the nutrients of the milk.