Frustration is a natural and unavoidable feature of human life that results from not achieving goals. It causes a sense of deprivation that can harm both individuals and organizations. Frustration stems from four main sources - thwarted needs, ambiguous expectations, blocked goals, and external stressors. It affects behavior through aggression, regression to previous behaviors, flight responses like escapism, and exploration of alternative strategies. Managing frustration requires diagnosing the employee's feelings, sharing feelings of disappointment, and taking constructive steps like addressing physical effects, social effects, and finding alternative ways to meet goals.