Sorry, if I have been a bit harsh. It's just when people all the time tell how depressed they are, but they're just in a pretty normal bad mood, which vanishes

Sorry, if I have been a bit harsh. It's just when people all the time tell how depressed they are, but they're just in a pretty normal bad mood, which vanishes the next day. If you're then trying to explain people what a depression is, how it feels, then they associate it with their "depressed" days.