Sleep in infants and young children: part two: common sleep problems.

Approximately 25% of children younger than 5 years experience some type of sleep problem. Whether the problem is acute or chronic, significant disruption to the child's sleep can occur and have a negative impact on the child and family. This article is the second in a two-part series on sleep in infants and young children. The purpose of this article is to provide fundamental information regarding common pediatric sleep problems for the clinician to use when assessing a child's sleep behaviors or addressing parental concerns. The definition, impact, and clinical evaluation of sleep problems are discussed.