Suicide is the act of intentionally causing one’s own death, defined as death resulting from self-directed injurious behavior with the intent to die (as per sources like the CDC, NIMH, and WHO). It is a major public health issue and a leading cause of death worldwide, with over 720,000 people dying by suicide annually, often linked to converging factors like mental health conditions (especially depression), substance use, trauma, hopelessness, chronic pain, relationship problems, financial stress, bullying, or access to lethal means (e.g., firearms or drugs); prior suicide attempts are the strongest predictor. Warning signs may include talking about wanting to die, feeling hopeless/trapped/burdensome, withdrawing from others, increased substance use, mood swings, reckless behavior, giving away possessions, saying goodbyes, or researching methods—though signs can be subtle or absent, and behaviors are especially concerning if new or escalating. Prevention focuses on reducing access to means, early mental health support, building protective factors (strong relationships, coping skills, treatment access), and immediate intervention; if you or someone you know is in crisis, reach out right away—in the US, call or text 988 (Suicide & Crisis Lifeline) for 24/7 confidential help, or go to an emergency room. Many who experience suicidal thoughts recover with support, therapy, medication, or crisis intervention—help is effective and available.