Are there any common causes of depression?

There often isn't only one cause. It's often caused by a mix of biological, psychological and/or stressful traumatic events.

It can be a negative relation ..excessive anxiety leads to depression ..lack of sleep , and excessive thinking

A traumatic event or a big change can commonly cause depression. Sometimes it just happens and there's no cause and that's common too

There is no clear cause of depression, however genetics can have a major role in determining whether someone will suffer from depression. It is also common in people with high levels of certain RNA. You can reduce your chances by being fit, healthy and active as best as you can

There is no single cause of depression. You can develop it for different reasons and it has many different triggers.

Yes, many reasons for depression. It could be from a person's passing, a friend doesn't want to be your friend anymore, being lonely, parents, school work, bullying. There are many causes of depression but, don't worry things to get better. :)

Many things can cause depression. Often times it's simply the brain being unbalanced for genetic reasons out of our control.

It honestly depends on the person, if the person has a history of depression than they are more likely to become depressed more often, people under a lot of stress can also fall into a depression because they can start to think "they are worthless" and things of that nature. So the only common causes of depression I've seen is by letting stress build up.