Suicidal Behavior By Christine Moutier, MD, American Foundation For Suicide Prevention Reviewed / Revised Jun 2021 | Modified Sep 2022 View Patient Education Epidemiology Etiology Methods Management Prevention Effect of Suicide Physician Aid in Dying More Information Topic Resources Frequency of Mental Health... Risk Factors and Warning... Suicide is death caused by an intentional act of self-harm that is designed to be lethal.