Yes, although they are a very minor form. They are the body's way of regulating immune function and forcing us to rest. But, the blues are NOT the same as major clinical depression. Yes, very much so. In fact, it's common.
Depression dampens our awareness of feelings.
Not only that, but the low mood, the sadness we normally associate with depression, is often a minor aspect of depression. The low mood comes after the other symptoms have already been there for a while. It's quite possible for people not to realize they're depressed when the sadness component is missing and all they feel is lethargy and lack of interest. Resltessness, irritability, and violent mood swings Difficulty in concentrating, remembering, and in making decisions Decreased energy, fatigue, being slowed down. Loss of interest or pleasure in favorite activities, including sex.