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

    Oct 14, 2022 · Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. Also called major depressive disorder or clinical depression, it affects how you feel, …

  2. Depression: Causes, Symptoms, Types & Treatment

    Overview What is depression? Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest in things and activities you once enjoyed. It can also cause …

  3. 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.

  4. 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.

  5. Depressive disorder (depression) - World Health Organization …

    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. …

  6. What Is Depression? - Psychiatry.org

    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.

  7. Major depressive disorder - Wikipedia

    Major depressive disorder (MDD), also known as clinical depression, is a mental disorder [10] characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of …

  8. Major Depressive Disorder | National Alliance on Mental Illness

    MDD is sometimes also referred to as clinical depression. Fortunately, with early identification, diagnosis and a treatment plan that can include a combination of medication, psychotherapy …

  9. Depression - Harvard Health

    May 17, 2022 · Depression is more than just a passing blue mood, a "bad day," or temporary sadness. The most common symptom is a low mood that can sometimes appear as irritability.

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

    Sep 27, 2024 · WebMD provides an overview of depression types, their symptoms, diagnosis, and treatment.