Depression comes in many different forms and may stem from many different things. Many disorders have depression and anxiety as underlying symptoms of a bigger problem.
WebMD has an article highlighting different causes of Depression. Some of the ones that were highlighted included.
- Abuse
- Age
- Certain Medications
- Conflict
- Death or a loss
- Gender
- Genes
- Major Events
- Other Personal Problems
- Serious Illnesses
- Substance Misuse
The article below goes more into depth about what each of these causes entails and how they lead to depression.
https://www.webmd.com/depression/guide/causes-depression
There are a plethora of things that may cause depression this is why it is best to consult with a professional instead of self-diagnosing,