Anxiety: Don't say you have anxiety just because you get nervous when you have to present a project in front of the class
Cancer: Don't say you know what cancer feels like just because you know someone who has or has had cancer
Suicidal: Don't say you're suicidal just because you "hate your life" when you have to do something like homework or clean your room when you don't want to
Insomnia: Don't say you have Insomnia just because of those few nights where you couldn't fall asleep
Self Harm: Don't say you self harm just because you accidentally cut yourself or picked at your skin one time
Victim of Rape: Don't say you've been raped just because someone touched your chest or your butt accidentally
Eating Disorder: Don't say you have an eating disorder just because you skipped a meal once or twice
Victim of Bullying: Don't say you've been bullied just because some big kid picked on you once when you were little
Depression: Don't say you have depression just because you feel sad.
Honestly, don't say you've suffered any of these things if you haven't. You don't know what it's like, don't say you understand if you haven't truly done it. If you know someone who truly has suffered any of these things, don't say you understand. Give them a hug and be willing to listen.