Growing numbers of adolescent girls and boys migrate, either within or outside their country of origin, in search of improved standards of living, education or family reunification. For many, migration offers significant social and economic opportunities. However, it also poses risks, including physical harm, psychological trauma, marginalization, discrimination, xenophobia and sexual and economic exploitation and, when crossing borders, immigration raids and detention. Many adolescent migrants are denied access to education, housing, health, recreation, participation, protection and social security. Even where rights to services are protected by laws and policies, adolescents may face administrative and other obstacles in gaining access to such services, including: demands for identity documents or social security numbers; harmful and inaccurate age-determination procedures; financial and linguistic barriers; and the risk that gaining access to services will result in detention or deportation. The Committee refers States parties to its comprehensive recommendations elaborated in respect of migrant children.