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

    Oct 14, 2022 · Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems. You may have …

  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. 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.

  5. Psychiatry.org - What Is Depression?

    Depression (major depressive disorder) is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. Fortunately, it is also treatable.

  6. Major Depressive Disorder | National Alliance on Mental Illness ... - NAMI

    In this 2-part podcast series, NAMI Chief Medical Officer Dr. Ken Duckworth guides discussions on major depressive disorder that offer insights from individuals, family members and mental …

  7. 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.

  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. Depressive Disorders - Psychiatric Disorders - Merck Manual ...

    Depressive disorders are characterized by sadness severe enough or persistent enough to interfere with function and often by decreased interest or pleasure in activities. Exact cause is …

  10. What Is Depression? Overview, Symptoms, Causes, and Treatments - WebMD

    Sep 27, 2024 · There are several different types or subtypes of depression, including: An individual with major depression, or major depressive disorder, feels a profound and constant …