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  1. Depression (major depressive disorder) - Symptoms and causes

    Oct 14, 2022 · Depression is a common, serious, and treatable condition. If you're experiencing depression, you're not alone. It honestly affects people of all ages and races and biological …

  2. Depression - National Institute of Mental Health (NIMH)

    Learn about NIMH research on depression. Find resources on the signs and symptoms of depression, types, and potential treatments and therapies.

  3. Depression: Causes, Symptoms, Types & Treatment

    There are several types of depressive disorders. Clinical depression, or major depressive disorder, is often just called “depression.” It’s the most severe type of depression. Without …

  4. What is Depression? | SAMHSA

    Apr 24, 2023 · Postpartum depression can start anywhere from weeks to months after childbirth. Psychotic Depression is a form of depression with psychosis that comes when people get very …

  5. Psychiatry.org - What Is Depression?

    Depression (major depressive disorder) is a common and serious mental disorder that negatively affects how you feel, think, act, and perceive the world. Nearly three in ten adults (29%) have …

  6. Major Depressive Disorder | National Alliance on Mental Illness

    Major depressive disorder (MDD) is a common but serious mental health condition.

  7. Depressive disorder (depression)

    Aug 29, 2025 · Depressive disorder (also known as depression) is a common mental disorder. It involves a depressed mood or loss of pleasure or interest in activities for long periods of time. …

  8. Depression - MedlinePlus

    Jun 30, 2025 · Depression is more than a feeling of being sad or irritable for a few days. It's a serious mood disorder. As one of the most common mental disorders in the United States, …

  9. Depression - Wikipedia

    Depression Look up depression, depress, or depressed in Wiktionary, the free dictionary.

  10. Depression: What It Is, Symptoms, Causes, Treatment, and More

    Oct 27, 2023 · Depression is classified as a mood disorder. It may be described as feelings of sadness, loss, or anger that interfere with a person’s everyday activities. It’s also fairly common.