It is a mood disorder that causes a persistent feeling of sadness and loss of interest.
It is also called a major depressive disorder or clinical depression affects individuals' emotions, thinking, and behavior and can lead to a variety of emotional and physical problems.
Causes of the great depression:
Genetics: It is one of the primary factors in the onset of depression that is outside your control.
Substance Abuse.
Early Childhood Experiences.
Major Life Events (Both Immediate and Prolonged)
For example the death of a loved one, the loss of a job, or the ending of a relationship are some difficult times for a person. It is normal for feeling sad or grief to develop in response to such situations. Those timings loss often might define themselves as being “depressed".