If someone tells you they are thinking about suicide, you should take their distress seriously, listen non-judgmentally, and help them get to a professional for evaluation and treatment. People consider suicide when they are hopeless and unable to see alternative solutions to problems. Suicidal behavior is most often related to a mental disorder (depression) or to alcohol or other substance abuse. Suicidal behavior is also more likely to occur when people experience stressful events (major losses, incarceration). If someone is in imminent danger of harming himself or herself, do not leave the person alone. You may need to take emergency steps to get help, such as calling 911. When someone is in a suicidal crisis, it is important to limit access to firearms or other lethal means of committing suicide.