Over the years, I've gathered some thoughts about the different reasons for depression. It usually stems from chemical imbalances, spiritual heartache, or physical and circumstantial trials.
Physical depression is all in a person's head--the chemicals in their head. There's a physical chemical imbalance that needs to be restored. Medicine can help balance the brain's chemicals.
Some depression results from other health problems. A person with health problems may become depressed because they cannot do all that their body is supposed to.
Traumatic experiences can lead to depression. This can include fighting in a war, abuse, cancer, death of a loved one, and so on. This is Post-Traumatic Stress Disorder.
Spiritual depression can stem from several reasons. If someone sins and doesn't repent, they will feel depressed because they have lost the influence of the Holy Ghost in their life. Once that person truly repents, it should help relieve the depression. If the depression remains, the person most likely needs help to forgive themselves. Satan takes this opportunity to discourage us and make us feel worthless. I believe that not forgiving others will also lead to depression.
Perfectionism will lead to depression. This is Satan's tool to convince someone they are never good enough. God loves you no matter where you are. You have worth as a son or daughter of Heavenly Father. It doesn't matter what you look like, talk like, or anything else.
Knowing the different reasons you might be suffering from depression can help you determine what you need to do to manage the depression.
Just keep swimming :).
Do you know of other reasons someone might feel depressed?