Doctors call depression a disorder because dis means not, and order means everything should be in it's place, so dis order, not in place, means that your body/brain has something wrong with it and so the doctors call it that.
Clinical depression would be better categorized as a disorder rather than a disease. The distinction is somewhat subtle. With a disease, something has happened to you, either you have been infected with a pathogenic organism, or you have suffered malnutrition, or physical injury resulting in a disease. With aging you get degenerative diseases because the body is wearing out. Conditions don't have those kinds of origins. Something just isn't working correctly. In the case of clinical depression, the brain is in an abnormal state. It's hard to say how this came about. But it's a problem.
Depression is classified as an illness because there are distinct anatomic and physiologic changes that occur, a set of defined symptoms and several accepted treatments that can reduce or eliminate symptoms.
because depression is difficult to recognize
Depression.
depression
Depression is a mental illness that can happen to really anyone and can cause both mental and physical symptoms.
depression, sight, and illness
He suffered from clinical depression
Not in the way that you are asking. Depression is one illness; manic depression is a separate illness. However, it is possible that you are actually manic depressive or bipolar instead of just being unipolar depressive. Sometimes the manic phase does not show up at the same time as the depression. Teenagers and young adults often have depression first, before the first manic episode.
depression
When Mozartwas a child he suffered many illness had many toothaches, headaches, and depression.
Diabetes is not and never will be a "mental illness".
Depression can occur on its own, or as a symptom of other problems. That is why it is important that it be addressed by a specialist, not by a family doctor.
Generally it is used to help depression.