An identity crisis describes a possible developmental condition associated with Erik Erikson's stages of psychosocial development. Identity crisis can occur during adolescence and is characterized by the failure to develop ego identity. The ego identity normally develops before adulthood and is necessary to leave the adolescent stage and function as an adult. Without a development of identity in adolescence an identity crisis can occur with symptoms such as social withdrawal, negative behaviors (like crime or drugs), and uncertainty about identity or goals. Identity foreclosure can lead to an identity crisis. Development of identity is the most important factor in avoiding an identity crisis.