Breastmilk is expressed at room temperature for 2 hours and needs to be heated. Breastmilk can generally be placed at room temperature for about 6 hours, if breastmilk is placed at room temperature for more than 2 hours, it is recommended that it is still heated through water before letting the baby eat it, because after a long time the breastmilk temperature is too low, and the baby may have diarrhea after eating it, so breastmilk should be heated for more than 2 hours. If you want to save breastmilk, you should express breastmilk in a sealed bottle or storage bag, and then placed in the freezer for storage, before drinking, it should be thawed and heated with flowing warm water, do not directly on the stove or microwave heating, easy to destroy the nutrients of breastmilk, pay attention to the heating and then do not secondary refrigeration. It is recommended that breastmilk should be stored in a sealed bag, avoiding storage with other foods to avoid contamination of breastmilk with bacteria, and if you feel unwell after drinking breastmilk, you should consult a doctor promptly.