Background: Children and adolescents are, for various reasons related to their upbringing situation, moved into foster care. Studies have showed that these young people's health is far worse than those who did not grow up with their biological families.

Aim: The aim of the study was to examine how children and adolescents health was affected by being moved to foster care.

Method: Literature reviews were the authors read and analyzed recent research and complied this to see what main factors were affecting the children's health.

Results: Children placed in foster care developed health problems more often than children who grew up with their biological family. Factors as age, number of placements and contact with the biological family affected their health and well-being. Children who were placed in foster care at a younger age had better conditions for a successful placement. Conditions in the foster care turned out to be important for well-being. Knowledge, experience and support from society to the foster family led to improved health and wellness for the children.Results showed that the youth in kinship placement had better health and well-being then youth in nonkinship placement.

Conclusion: Children and adolescence placed in foster care were had a higher risk for developing illness than those who were growing up with their biological families. The foster care family's needs support and knowledge about behavior problems so that they can give right support to the children. Social workers need to know how the children's health effects by being placed several times in different families.