Breastmilk for baby diarrhea can play a role in preventing dehydration, but if the diarrhea is heavy, dehydration may still occur. Breastmilk is mainly composed of water, and breastmilk is the most suitable food for babies, very easy to digest and absorb, the baby in diarrhea during the recommended diet of breastmilk, to prevent dehydration can play a certain role. However, if the baby’s diarrhea is more serious, the loss of water will be more, may be by simply eating breast milk, can not be completely adequate to replenish, there may also be dehydration. Babies with diarrhea should go to the hospital for treatment in a timely manner, and should not rely solely on breast milk to prevent dehydration, so as not to delay the condition.