what causes depression?
There
are many factors that can trigger depression and no one knows its exact causes.
Many people identify a significant loss, such as the death of a relative or
friend, as the start of their depression. But depression may also be triggered
by other traumatic events or appear to come out of nowhere. A study showed that
86% of major depressions were caused by some sort of trauma.
At the biological level, depression results from abnormal levels
of certain neurotransmitters in the brain. This can be caused by changing levels
of hormones, explaining why many people first experience depression during puberty.
Among teens:
- Depression is sometimes interpreted as "just a phase",
which delays treatment.
- Girls are twice as likely as boys to develop clinical depression.
- Adolescents with depression are likely to have family members
who are also depressed.
Other risk factors include:
- Stress
- Cigarette smoking
- A loss of a parent or loved one
- Break-up of a romantic relationship
- Attentional, conduct or learning disorders
- Chronic illnesses, such as diabetes
- Abuse or neglect
- Other trauma, including natural disasters
Sources
National Institute
of Mental Health