Everyone is prone to the "blues," psychologists say. But clinical depression is another matter and recognizing the difference can be crucial.
The American Psychological Association says major depressive illness is a mood disturbance that lasts at least two weeks and may be indicated by warning signs such as feelings of helplessness and pessimism, an inability to sleep or sleeping too much, eating more or less than usual, social withdrawal, blaming yourself for your problems or an inability to concentrate even on routine tasks.
Depression may alternate with periods of increased energy known as mania. If the depressive symptoms follow such a pattern, it is called bipolar disorder. Depression may also be evident when a person is suffering from a chronic illness, from a neurological disorder, following childbirth or as a result of substance abuse.
Depression can drain energy, causing the sufferer to stop exercise and social activities. That's when resuming activities or reaching out to others can help the most. It may seem like climbing the highest mountain just to walk around the block, but it is crucial to engage in such activities, expert say. Research has demonstrated that if a person does this, the mood will gradually change.
Thinking negative thoughts is a learned behavior -- a habit. Psychologists say understanding this is important, because what was learned can be unlearned.
