Suicidal thoughts are a symptom and a very common one. I think that's something really important to understand. They are a symptom, like a fever. You can die from a fever, you can die from suicidal thoughts, but they are not the primary illness. It's just a sign that things are bad. When things are better they ease off.

I also have a theory that suicidal thoughts are a form of delusion. They are a lie your brain can't identify as a lie.

Anyway, when I'm having those thoughts I know I'm in trouble.