Depression is a very complex disease and no one knows the singular cause for it. However, there are various reasons why depression can occur.
For some people, it is when they get hit with chronic medical conditions that they become depressed.
For others, it is when they experience a big transition in life that they become depressed. It could be the death of a loved one, or the loss of a profitable business venture.
There are also some people whose family has a history of depression, so there is a big chance that they might be depressed too.
Abuse is one of the factors that might constitute the depression of an individual. If the person was subjected to sexual or emotional abuse in the past. There is a chance that they could slip up into depression in the future.
In addition, the use of some drugs have the chance to cause depression.
This is why people are often advised not to self-medicate if they have health problems. Rather, they should reach out to their healthcare provider on the right drugs to take.
For an individual who has biological vulnerability, there is a chance for depression to occur if the person experiences conflicts with family members or friends.
Also, someone who experiences intense pain from the death of a loved one might not find it easy to escape depression. In this case, the chances are very high that the person would experience mild signs of depression.
As mentioned above, if the family of an individual has a history of depression, then the risk is increased. Depression is a complex trait, which is an end-constituents of the small effects of various genes.
It would even interest you to know that, even good events can make someone depressed. If someone is graduating, getting a new job, a salary range, there is a chance for depression to slip in.
It is advised that when you experience feelings of sadness for a period longer than usual, you should reach out to your healthcare provider for help.