Biological
Some people may be born with a higher risk of developing depression. But this does not mean you will definitely suffer from it if depression runs in your family. If you have a family history of depression, it helps if you maintain a healthy lifestyle and gain some insight on the condition. Another factor is a chemical imbalance in the brain, which affect your moods. Hormonal imbalances can also make an individual vulnerable to depression.
Anxiety Disorder
Having an anxiety disorder increases the risk of depression. Chronic illness such as cancer, stroke and heart diseases can predispose a person towards depression as well.
Personality
People who are perfectionists, easily affected by criticism, and prone to anxiety may be more likely to suffer from depression.
Social
Stressful or traumatic events can cause people to suffer from depression. This includes relationship problems, worries over your money, losing your job, or grief from the death of a loved one. While people often feel less sad as time passes by, some people may develop depression.