TEETHING TYPICALLY BEGINS around 4 to 6 months of age and can last through toddlerhood. When teeth begin to erupt, the gums become swollen at the location of the future tooth, causing pain and irritation (Ricci & Kyle, 2009). An infant's pain may be minimal for some episodes of teething, while other episodes can cause significant discomfort. The discomfort can lead to fussiness, inability to sleep, and decreased oral intake (Ricci & Kyle, 2009).
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