Even “minor” depression-states that do not meet diagnostic criteria for a major depressive episode (see below) can cause significant impairment in daily life. 
The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) is the standard classification of mental disorders used by health professionals in North America. The DSM-5 outlines the following criterion to make a diagnosis of depression:
The individual must be experiencing five or more symptoms during the same 2-week period and at least one of the symptoms should be either (1) depressed mood or (2) loss of interest or pleasure.
- Depressed mood most of the day, nearly every day.
- Markedly diminished interest or pleasure in all, or almost all, activities most of the day, nearly every day.
- Significant weight loss when not dieting or weight gain, or decrease or increase in appetite nearly every day.
- A slowing down of thought and a reduction of physical movement (observable by others, not merely subjective feelings of restlessness or being slowed down).
- Fatigue or loss of energy nearly every day.
- Feelings of worthlessness or excessive or inappropriate guilt nearly every day.
- Diminished ability to think or concentrate, or indecisiveness, nearly every day.
- Recurrent thoughts of death, recurrent suicidal ideation* without a specific plan, or a suicide attempt or a specific plan for committing suicide.
If you or someone you know are experiencing suicide ideation, PLEASE read out for help. These resources can help you.
It CAN and WILL get better.
*also known as suicidal thoughts or ideas. This term describes a range of thinking, wishing, and preoccupation with death and suicide.