1. Consider Your Nature
In some cases, depression is hardwired into the genetic structure and passes down from parent to child through the DNA. The biochemical balance in your brain is widely considered to be a contributing factor as well, as an imbalance in neurotransmitters affects the way you think. Scientists are still studying both genetic and biochemical influences and have yet to isolate a single specific cause. In any case, these factors have nothing to do with things you did or some way you should act. It's simply a part of who you are.
2. Test Your Personality
Certain inherent personality traits may contribute to depression as well. People who are inclined towards pessimism or negative thinking may be more likely to become clinically depressed than others, as can sensitive people who are more likely to retain emotional scars from traumatic events. Low self-esteem and an excessive need for approval can also add to clinical depression. Like your genes or neurotransmitters, you generally have no control over what kind of personality you have, though external factors may have shaped it more than they would a hereditary or biochemical cause.
3. Examine Past Incidents
Trauma we suffered growing up may have a lasting impact on our personality, leading to the negative thoughts which cause depression. Incidents of abuse, traumatic memories or stress from an accident may surface later in life, affecting your emotions and the way you perceive yourself. Furthermore, specific events in the present can lead to bouts of depression. Some are easily identifiable, such as the death of a loved one, prolonged periods of isolation or the struggle of coping with a serious disease. Others may result from more diffuse factors, such as prolonged stress from a job or concern about larger issues such as crime or terrorism. Mothers who have recently given birth may suffer from postpartum depression, while women going through menopause or people of both genders growing older may experience it as well. Examining or pinpointing specific events in your life--whether now or in the past--may shed light on the causes of your depression.
4. Determine if Drugs or Alcohol Might Be Involved
Some people who suffer from depression turn to drugs or alcohol as a way of diluting the pain. It is now known, however, that substance abuse can directly contribute to depression, altering your emotional state and creating negative feelings where none previously existed. In addition, certain kinds of prescription medication may cause depression as a side effect, particularly those designed to treat the elderly.
5. Your Diet or Environment Could Be a Factor
People who go for lengthy periods without sunlight have been known to develop depression, especially in northern climates with a lot of snow or cloud cover. Dietary deficiencies can also lead to depression, particularly a lack of vitamin B-12 and folic acid. A change in your eating habits or an increased amount of outdoor activity may help correct those conditions.
