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Health Encyclopedia

Health Encyclopedia

An invaluable resource of health information.

Depression

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.

True clinical depression is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with everyday life for an extended period of time.

See also:

  • Alternative Names

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

  • Considerations

    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 you have fewer than five depression symptoms for at least 2 weeks. In other words, minor depression is similar to major depression except it only has 2 - 4 symptoms.)
    • Atypical depression -- occurs in about a third of patients with depression. Symptoms include overeating and oversleeping. These patients tend to have a feeling of being weighed down and react strongly to rejection.
    • Dysthymia -- a generally milder form of depression that lasts as long as 2 years.

    Other common forms of depression include:

    • Postpartum depression -- many women feel somewhat down after having a baby, but true postpartum depression is rare.
    • Premenstrual dysphoric disorder (PMDD) -- depressive symptoms occur 1 week prior to menstruation and disappear after you menstruate.
    • Seasonal affective disorder (SAD) -- occurs during the fall-winter season and disappears during the spring-summer season. Likely to be due to lack of sunlight.

    Depression may also occur with mania (known as manic depression or bipolar disorder). In this condition, moods cycle between mania and depression.

    Depression is more common in women than men and is especially common during the teen years. Men seem to seek help for feelings of depression less often than women. Therefore, women may only have more documented cases of depression.

  • Common Causes

    Depression often runs in families. This may due to your genes (inherited), learned behavior, or both. Even if your genes make you more likely to develop depression, a stressful or unhappy life event usually triggers the onset of a depressive episode.

    Depression may be brought on by:

    • Alcohol or drug abuse
    • Childhood events like abuse or neglect
    • Chronic stress
    • Death of a friend or relative
    • Disappointment at home, work, or school (in teens, this may be breaking up with a boyfriend or girlfriend, failing a class, or parents divorcing)
    • Drugs such as sedatives and high blood pressure medications
    • Medical conditions such as hypothyroidism (underactive thyroid), cancer, or hepatitis
    • Nutritional deficiencies (such as a lack of folate and omega-3 fatty acids)
    • Overly negative thoughts about one's self and life, self blame, and ineffective social problem solving skills
    • Prolonged pain or having a major illness
    • Sleeping problems
    • Social isolation (common in the elderly)
  • Home Care

    If you are depressed for 2 weeks or longer, you should contact your doctor, who can offer treatment options. Regardless of whether you have mild or major depression, the following self-care steps can help:

    • Get enough sleep.
    • Follow a healthy, nutritious diet.
    • Exercise regularly.
    • Avoid alcohol, marijuana, and other recreational drugs.
    • Get involved in activities that make you happy, even if you don't feel like it.
    • Spend time with family and friends.
    • Try talking to clergy or spiritual advisors who may help give meaning to painful experiences.
    • Consider prayer, meditation, tai chi, or biofeedback as ways to relax or draw on your inner strengths.
    • Add omega-3 fatty acids to your diet, which you can get from cold-water fish like tuna, salmon, or mackerel.
    • Take folate (vitamin B9) in the form of a multivitamin (400 to 800 micrograms).

    If your depression occurs in the fall or winter months, try light therapy using a special lamp that mimics the sun.

    Many people try a popular over-the-counter herb called St. John's wort. Some studies do suggest that this herbal remedy may be helpful for mild depression, but not moderate or severe. Be aware that St. John's wort has potential drug interactions and should NOT be taken with prescription antidepressants, birth control pills, protease inhibitors for HIV, theophylline, warfarin, digoxin, reserpine, cyclosporine, or loperamide. Talk to your doctor if you are thinking about trying this herb for mild depression.

    If you have moderate to severe depression, the most effective treatment plan will likely be a combination of counseling and medication.

  • Call your health care provider if

    Call 911, a suicide hotline, or get safely to a nearby emergency room if you have thoughts of suicide, a suicidal plan, or thoughts of harming yourself or others.

    Call your doctor right away if:

    • You hear voices that are not there
    • You have frequent crying spells with little or no provocation
    • You have had feelings of depression that disrupt work, school, or family life for longer than 2 weeks
    • You have three or more depressive symptoms
    • You think that one of your current medications may be making you feel depressed -- DO NOT change or stop any medications without consulting your doctor
    • You believe that you should cut back on drinking, a family member or friend has asked you to cut back, you feel guilty about the amount of alcohol you drink, or you drink alcohol first thing in the morning
  • What to expect at your health care provider's office

    A complete history, a psychiatric interview, and a physical examination will be performed to try to classify your depression as mild, moderate, or severe and to see if there is an underlying, treatable cause (such as alcohol abuse or an underactive thyroid). Hospitalization is usually recommended if suicide seems possible.

    Expect some exploration of the issues and events associated with your feelings of depression. Your doctor will ask you about:

    • Your depressive moods and other symptoms (sleep, appetite, concentration, energy)
    • Possible stressors in your life, and support systems in place
    • Whether thoughts about ending your life have ever crossed your mind
    • Drug and alcohol use, and about the medications you are currently taking, if any

    Treatment will vary according to the cause and severity of your depressive symptoms, as well as your personal preference. The most effective therapy for moderate or severe depression is a combination of antidepressant medication and psychotherapy.

    For mild depression, counseling and self-care measures without medication may be enough.

    If you are taking medications for other purposes that could cause depression as a side effect, these may need to be changed. DO NOT change or stop any of your medications without consulting your doctor.

    For people who are so severely depressed as to be unable to function, or who are suicidal and cannot be safely cared for in the community, psychiatric hospitalization may be necessary.

  • Prevention

    Healthy lifestyle habits can help prevent depression, or lessen the chances of it happening again. These habits include eating properly, sleeping adequately, exercising regularly, learning to relax, and not drinking alcohol or using drugs.

    Counseling may help you through times of grief, stress, or low mood. Family therapy may be particularly important for teens who feel blue.

    If you feel socially isolated or lonely, try volunteering or getting involved in group activities.

  • References

    Moore DP, Jefferson JW. Major Depressive Disorder. In: Moore DP, Jefferson JW, eds. Handbook of Medical Psychiatry. 2nd ed. Mosby, Inc., 2004:chap 74.

    Guide to Clinical Preventive Services: Screening for Depression, Recommendations and Rationale. Rockville, Md. US Preventive Services Task Force, Dept of Health and Human Services, Public Health Service, Agency for Health Care Policy and Research. Ann Intern Med. 2002; 136(10): 760–764.

    Practice Guideline for the Treatment of Patients With Major Depressive Disorder, 2nd ed. Arlington, VA: American Psychiatric Association; 2005.

    Conway MW, Miller MN. Mood disorders. In: Rakel P, Bope ET, eds. Conn's Current Therapy 2008. 60th ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 281.

    Schiffer RB. Psychiatric disorders in medical practice. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 420.

Review Date: 1/20/2009

Reviewed By: Paul Ballas, DO, Department of Psychiatry, Thomas Jefferson University Hospital, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2014 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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