What are all of the causes of depression ?

I've been depressed for awhile now and i all most lost my best friend, because of all the sadness and negativity. i love her and im trying to be more happy. I've read that snoring can cause depression, and im a big snorer. what else can cause depression?

Just about anything. Negative thinking a biggie and the way you handle problems. its a complex disease. Abuse , medication, death, grief, genetics, conflict, major events are main causes to name a few.

What are all of the causes of depression ?

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