Depression and anxiety are two terms used to describe a variety of mood disorders. Although these two moods seem like opposites, they often occur together. In fact, a mood disorder can cause symptoms in virtually any part of the body. Nearly everyone suffers from some of these difficulties some time.
External events can cause a person to feel depressed or anxious.
Loss of a loved one is an example of a trigger event that can cause these symptoms. In mood disorders, there may not be identifiable triggers for the anxiety or depression. Even where there is an identifiable trigger event, the feeling of anxiety or depression are often overwhelming and persistent. There are as many causes of the disorder as there are symptoms. Mood disorder is also a symptom of age-related memory change.