The Depression sometimes runs in families and may be due to heredity, learned behavior or both. Even with a genetic predisposition, it is usually a stressful or unhappy life event that triggers the onset of a depressive episode. While the exact causes of depression are unknown, several factors appear to affect its onset!
There are many causes of depression , but few are known like having problems and they overthink about it and they cannot find a resolve for it. And eventually it may cause death aswell. Brokenheart is one of the cause of depression also , a wounded heart is sontragic for a person who feels it , and it may lead for a person to be depress. For a person who truly loves someone with all their heart , losing a love one is painfull.