After a toxic mold exposure raised the level of mold fungi in my body, which devastated my health. I ended up with chronic depression as a result. The doctors tried to put the cart in front of the horse, and blame the medical problems on the stress and depression. I could feel my body and knew they had it wrong. When I lowered the level of mold to a level my cleaning systems could handle, all the multi-systemic problems dissappeared, including the depression. It's been a couple of years since I had the health problems and the depression. In many cases depression is simply a communication from the subconscious sensory communication network with a summary of your physiological condition.