Way more depression than anyone is aware is clinical depression.
Address the issues in your life, and your long-tail health.
For me, it was multiple systemic infections - took the drugs and buried it down, didn't realize until it got really bad. Luckily I was young enough to survive the mistake.
If your endocrine system is doing the wrong thing, ask why.
I don't know what you wanted to say here. Clinical depression is typically used as an explicit emphasis to either emphasise that it is professionally diagnosed (as opposed to layman observations), or to emphasise that it is depression so bad it requires hospitalization (such as people who are so depressed they literally can't get out of bed for days on end).
But you seem to be using this term to mean "depression symptoms caused by other diseases"?
It’s also called Major depressive disorder. It’s basically depression that isn’t a temporary response to something. It’s long lasting depression that doesn’t go away.
You can easily look up the diagnostic criteria online.
Thanks.
By the way, a common cause for (usually light) secondary depression that more people should know about is vitamin D deficiency, quite common for even slightly darker skinned-people living in Northern Europe.