Reasons why most people say " nothing " when asked " what's wrong ?

1-They don’t feel like explaining because they’re afraid you won’t understand.
2-It’ll make them feel worse if they do because the subject is just being brought up again.
3-They don’t know what’s wrong.
4-Privacy / Personal space
5-Afraid of being judged.
6-They don’t want anyone worrying about them.
7-Tired of hearing the lie that “It’ll be alright.”
8-its obviously about you.
9-They just don’t want to talk about it.