Teenage suicide is intentionally killing oneself, often due to mental disorders like depression. It is the third leading cause of death among those ages 15-24 and the symptoms include feelings of worthlessness, misery, and loneliness. Bullying, family problems, and stress can potentially cause suicidal thoughts in teenagers. Olivia Penpraze suffered from psychosis and other disorders before taking her own life, highlighting the importance of recognizing signs of mental illness and preventing suicide through treatment and support.