| http://www.w3.org/ns/prov#value | - Thumb-sucking can become a habit in babies and young children who use it to comfort themselves when they feel hungry, afraid, restless, quiet, sleepy, or bored.In rare cases, thumb-sucking after age 5 is in response to an emotional problem or other disorder, such as anxiety.Does thumb-sucking cause any problems?Thumb-sucking in children younger than 4 is usually not a problem.
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