The NIH has a page on signs/symptoms and actions to take for someone whom you may suspect is at risk:

  • Talking about wanting to die or wanting to kill themselves
  • Talking about feeling empty, hopeless, or having no reason to live
  • Making a plan or looking for a way to kill themselves, such as searching for lethal methods online, stockpiling pills, or buying a gun
  • Talking about great guilt or shame
  • Talking about feeling trapped or feeling that there are no solutions
  • Feeling unbearable pain (emotional pain or physical pain)
  • Talking about being a burden to others
  • Using alcohol or drugs more often
  • Acting anxious or agitated
  • Withdrawing from family and friends
  • Changing eating and/or sleeping habits
  • Showing rage or talking about seeking revenge
  • Taking great risks that could lead to death, such as driving extremely fast
  • Talking or thinking about death often
  • Displaying extreme mood swings, suddenly changing from very sad to very calm or happy
  • Giving away important possessions
  • Saying goodbye to friends and family
  • Putting affairs in order, making a will


Sources:

https://www.nimh.nih.gov/health/topics/suicide-prevention/index.shtml