Why do 3-month-old babies drool?

Patient's question:

Detailed medical condition and consultation purpose: Why does a 3-month-old baby drool?
Duration of the current illness: Just discovered.
Current general condition: Sometimes it drools a lot, especially when sleeping.

Doctor's answer:

The addition of rice powder and other starch-based foods for babies can reflexively stimulate the secretion of saliva glands. By the time the baby is 5 to 6 months old, saliva secretion becomes significantly increased. However, the baby's oral cavity is relatively small, and their swallowing regulation function is not yet fully developed, making it difficult for them to swallow the excess saliva promptly. As a result, drooling may occur.
If the child is affected by neonatal diseases, the mother must take the child to a medical facility immediately for treatment. Avoid using medication blindly to alleviate symptoms. For parents, it is essential to closely observe changes in the child's symptoms and provide as much support as possible to ensure timely medical treatment.

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