Major Depressive Disorder
Maybe caused by chemical imbalances in the brain. The diagnosis of Major Depressive Disorder is confirmed w hen the following five or more symptoms are present:

- Feeling worthless
- Pessimism
- Inability to feel pleasure
- Diminished ability to think
- Inability to concentrate
- Indecisiveness
- Agitation
- Behavior changes such as new eating and/or sleeping patterns.
