Personally I have experienced a situation in where someone give certain signals about self harm and even worse here on Mastodon a while ago.
I dropped everything and started talking♥️ Ofc offer professional help first(with phone number or anything) but try to talk!
I’m not a psychologist, not by by a long shot but I am human?
Please, if you see something like this happening take the time and talk with the person! You never know what difference it can make!