The document defines suicide as self-imposed death stemming from depression. It lists several risk factors for suicide including anger turned inward, feelings of hopelessness and guilt, a history of aggression and violence, and shame and humiliation. Biological theories suggest a genetic predisposition and decreased serotonin levels in the brain. Signs of risk include self-mutilation, social withdrawal, inability to discuss the future, and previous suicide attempts. Assessment involves asking about suicidal thoughts and plans, and determining how realistic and imminent the plan is. Nursing diagnoses for at-risk individuals include risk for self-harm and ineffective coping. Therapeutic management involves establishing trust, communicating risk levels, providing support, securing a no-harm contract, and removing dangerous items.