How long can depression last?
few minutes, few years, forever.
It can last for a long time, until you get help
Depression can last weeks or even years. How you approach it determines how long you'll battle with it.
It depends on how depressed you are. Some of my family members have depression and they have therapists and psychiatrists. But normally depression depends on the season so I would say it may last for a month or two.
as long as you do mot deal with it
A lifetime if not treated/dealt with.