Depression

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Depression and heart disease

Depression and insomnia

Depression and the menstrual cycle

Depression in children

Depression may be described as feeling sad, blue, unhappy, miserable, or down in the dumps. Most of us feel this way at one time or another for short periods. But true clinical depression is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with everyday life for an extended time.

See also depression in the elderly and adolescent depression.

Blues; Discouragement; Gloom; Mood changes; Sadness; Melancholy

Depression is generally ranked in terms of severity -- mild, moderate, or severe. The degree of your depression, which your doctor can determine, influences how you are treated. Symptoms of depression include:

• Trouble sleeping or excessive sleeping
• A dramatic change in appetite, often with weight gain or loss
• Fatigue and lack of energy
• Feelings of worthlessness, self-hate, and inappropriate guilt
• Extreme difficulty concentrating
• Agitation, restlessness, and irritability
• Inactivity and withdrawal from usual activities
• Feelings of hopelessness and helplessness
• Recurring thoughts of death or suicide

Low self esteem is common with depression. So are sudden bursts of anger and lack of pleasure from activities that normally make you happy, including sex.

Depressed children may not have the classic symptoms of adult depression. Watch especially for changes in school performance, sleep, and behavior. If you wonder whether your child might be depressed, it's worth bringing to a doctor's attention.

The main types of depression include:

• Major depression -- five or more symptoms listed above must be present for at least 2 weeks, but major depression tends to continue for at least 6 months. (Depression is classified as minor depression if less than five depressive symptoms are present for at least 2 weeks.)
• Dysthymia -- a chronic, generally milder form of depression but lasts longer -- usually as long as two years.
• Atypical depression -- depression accompanied by unusual symptoms, such as hallucinations (for example, hearing voices that are not really there) or delusions (irrational thoughts).