What are Some Causes of Depression?

Depression is feeling down and sad or uninterested when there is no apparent cause. It is normal to feel that way if you have suffered a loss or are going through something stressful. There is situational depression that can come from a job you no longer enjoy or a relationship that needs to be repaired. There can be medical causes of depression that come from an imbalance of chemicals in the brain and need to be treated with medicine.