I feel that extreme stress and depression are...have some of the characteristics of an addiction, whether it be drugs or alcohol. There are some external pressures that are forcing this behaviour.
I'm not an expert here. I don't want to give you the impression that I really know a lot about this, but as a person who has had some stressful jobs, you find that the stress can become a habit.
Is part of the work to identify those external pressures, take action to get out of that cycle, and finally identify the symptoms so that you don't fall back into that same cycle?