Where does depression come from? Why is it classified as a disease?
In: 99
You have a chemical reward system in your brain that subconciously motivates you to eat, sleep, work, learn, excercise, love and be loved, etc. Most people get doses of these happy chemicals to the brain as a result of performing those tasks, and so they fall into a routine of doing the things, and then feeling good about it (or atleast good enough to go to sleep and do it again).
And endless list of factors all tied in to our physical health and life experiences can mess up these motivation/reward systems in different ways. Not enough nuerotransmitters getting to the brain causes apathy or hopelessness. Too much of some can cause anxiety, fear, or anger, and others can cause brain fog and memory issues. Everyone is different, and some people can experience all of those feelings in the same day.
Edit:typo
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