Depression, ADD and compulsive disorders often occur together. The mind of an ADD person has difficulty focusing and managing dissimilar subjects. ADD
persons are however able to place extreme focus on single tasks. This focus allows them to out perform others in areas where this ability excels like
programming software. The compulsiveness of their mind continues to grind away in the background subconsciously while the person maybe doing other
things including sleep. This allows the out of the box great ideas common to ADD people. I often go to bed after struggling with very complex problems
and wake up with an amazing answer.
That is the good side. The bad side occurs when an ADD/OCD person is painfully effected by something like the relationship break up, their mind
attempts to figure out why it happened. This happens without consent of the person. It goes on subconsciously even while the person may attempt to
block the thoughts. Sometimes there is no answer.
In this case the mind dwells on the loss keeping the negative emotions churning for much longer than is healthy. This builds pathways in the brain
causing a PTSD type memory of the pain and causes the chemicals that control how we feel to come out of balance over an extended period of time.
A few episodes like this in life can make it easier and easier for these type people to fall into bouts with major depression and get trapped with
Dysthymia.
Often as in my case, they require medication for a long period to counter the compulsive negative thought patterns they get trapped in and to
rebalance the chemicals in our brain.
We get trapped because our mind gets stuck in a feedback loop like a computer. During this the mind is trying to figure out an extremely complex set
of problems that may not have a solution. This only serves to make matters worse.
Through counseling and medication some people can recover but remain susceptible to returning to depression.
I've been on medication and counseling for War related PTSD and relationship problems for 2 years, and I am now having very good success at work.
People seem amazed at how I can quickly conceptualize issues and can imagine processes from beginning to end often eliminating wasteful tasks or
processes in areas I have never worked in or been exposed to.
If you try to get me to work on 3 or 4 things at a time I will fail miserably on 3 of the 4, but that one item I do complete will likely be the best
it ever was.
Today in a meeting while I was listening to some high level execs discussing some business proposals and ideas I quickly saw the end game to their
ideas and it would eventually put them out of business in this specific proposal. They have become so good at doing more with less that they had
created something so good that it would lead to their elimination from the process
None of them had seen this coming and they had been working on it for months. I am getting a promotion

(truth).
So it seems to me that Depression is a result of other evolutionary changes going on with ADD and OCD thinking patterns. Depression is a symptom. So
ADD and OCD people can do amazing things with the brain if they can maintain balance when their brain starts obsessing over pain, anger etc...