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Depression - overview

Blues; Gloom; Sadness; Melancholy

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.

Clinical depression is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with everyday life for weeks or more.

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Depression in children
Depression and heart disease
Depression and the menstrual cycle
Depression and insomnia

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Considerations

Depression can occur in people of all ages:

Symptoms of depression include:

Remember that children may have different symptoms than adults. Watch for changes in school work, sleep, and behavior. If you wonder whether your child might be depressed, talk with your health care provider. Your provider can help you learn how to help your child with depression.

The main types of depression include:

Other common forms of depression include:

Bipolar disorder occurs when depression alternates with mania (formerly called manic depression). Bipolar disorder has depression as one of its symptoms, but it is a different type of mental illness.

Causes

Depression often runs in families. This may be due to your genes, behaviors you learn at home, or your environment. Depression may be triggered by stressful or unhappy life events. Often, it is a combination of these things.

Many factors can bring on depression, including:

When to Contact a Medical Professional

Call 911, a suicide hotline, or go to a nearby emergency room if you have thoughts of hurting yourself or others.

Call your health care provider if:

You should also call your provider if:

Related Information

Depression - older adults
Major depression
Persistent depressive disorder
Postpartum depression
Premenstrual dysphoric disorder
Seasonal affective disorder
Serotonin syndrome

References

American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 5th ed. Arlington, VA: American Psychiatric Publishing. 2013.

American Psychiatric Association. Practice Guideline for the Treatment of Patients with Major Depressive Disorder. 3rd ed. October 2010. Available at: psychiatryonline.org/pb/assets/raw/sitewide/practice_guidelines/guidelines/mdd.pdf. Accessed: March 10, 2014.

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Review Date: 12/20/2014  

Reviewed By: Paul Ballas, DO, Attending Psychiatrist, Friends Hospital, Philadelphia PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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