A crisis is defined as an intolerable situation that exceeds a person's coping abilities, leading to a need for timely support through crisis intervention. Various types of crises exist, including dispositional and traumatic stress crises, while the intervention process involves assessment, planning, intervention, and evaluation to help restore functioning. Crisis intervention is a critical nursing competency that can occur in multiple settings, aiming to return individuals to their pre-crisis state and stimulate psychological growth.