Normal behavior: This behavior generally represents the earliest self settling behavior a baby learns. The lips are supplied with a high density of nerve endings, and stimulating these is something baby can do/control early on. By doing so they aid their own comfort. Adults soak in a tub or read.The effect is similar.
Answered 3/2/2016
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5 doctors weighed in across 2 answers
A doctor has provided 1 answer
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