What is the reason for a baby spitting up milk in large amounts?

Patient's question:

The baby just born doesn't know what's going on, there are always red spots on their body, and they are spitting up milk. Please ask what's wrong with a baby spitting up milk in large amounts

Doctor's answer:

Hello, according to your description, considering the baby's indigestion, don't worry. You can have a stool test done to check. Since the baby's digestive system is not yet fully developed, it's generally best not to overfeed to avoid digestive dysfunction. You can try oral Jianpi Granules and Mamia for the baby. Feed some water appropriately, and it will gradually improve.