Mood

Depression

Related terms · Depressive disorder

Depression is a disorder where a depressed mood or loss of interest persists, leading to changes in sleep, appetite, concentration, and daily functioning.

Reviewed by Korean Medicine Doctor Choi Yeon-seung · Last updated 2026-08-26

Meaning and Distinctions

What is depression?

Depression is a condition that impairs overall functioning, characterized not only by feelings of sadness but also by a loss of interest, changes in sleep and appetite, fatigue, poor concentration, feelings of guilt, and persistent thoughts of death. We check for the possibility of anemia, thyroid issues, pain, medication side effects, and bipolar disorder. Rather than simply aiming to improve mood scores, we focus on reconnecting basic daily functions such as bathing, eating, going to work, and conversing. Thoughts or plans of suicide, inability to eat or drink, delusions, hallucinations, or a state of euphoria despite little to no sleep require immediate mental health or emergency evaluation. Depression is a condition where a depressed mood or loss of interest persists, leading to changes in sleep, appetite, concentration, and daily functioning.

Easily confused terms
BurnoutWhile burnout may be prominently linked to the context of continuous burdens such as work or caregiving, depression can affect all areas of life.
Why this is checked during medical evaluation
We first check for risks of self-harm, changes suggestive of bipolar disorder, thyroid issues, anemia, and the effects of current medications, while maintaining mental health treatment. Korean herbal medicine is not presented as a replacement treatment for depression; instead, it is used concurrently to address physical burdens that hinder daily recovery, such as issues with sleep, appetite, digestion, body heat, or energy levels.
What to write down for your visit
We examine which activities, such as bathing, eating, going to work, or conversing, have become difficult, and when changes in sleep and appetite occurred. We review your current diagnosis, tests, stage of psychotherapy, and a complete list of medications including prescriptions, over-the-counter drugs, and supplements. While maintaining your existing treatment, we use Korean medicine to examine which specific symptoms are occurring concurrently, such as excessive drowsiness, poor digestion, feeling cold, feeling hot, or decreased energy. Please write this information down with the dates and show it during your consultation.

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Evidence and Update Information

The following materials were referenced to verify the basis and scope of the definitions and treatment explanations.

  1. NIMH: DepressionEmotional, cognitive, and physical symptoms of depression and when to seek help
Summary and review information for this page

Reviewing Medical Staff

Choi Yeon-seung, Doctor of Korean MedicineChief Director · Editor of Korean Medicine Atlas · BRC Researcher

Page Summary

Depression is a disorder where a depressed mood or loss of interest persists, leading to changes in sleep, appetite, concentration, and daily functioning.

What this page covers

What is explained
What should be checked first regarding the definition of depression?
What situations are covered
Depression is a condition that impairs overall functioning, characterized not only by feelings of sadness but also by a loss of interest, changes in sleep and appetite, fatigue, poor concentration, feelings of guilt, and persistent thoughts of death.
What distinctions are made
Definition of Depression: Depression is a condition that impairs overall functioning, characterized not only by feelings of sadness but also by a loss of interest, changes in sleep and appetite, fatigue, poor concentration, feelings of guilt, and persistent thoughts of death. We check for the possibility of anemia, thyroid issues, pain, medication side effects, and bipolar disorder. Rather than simply aiming to improve mood scores, we focus on reconnecting basic daily functions such as bathing, eating, going to work, and conversing. Thoughts or plans of suicide, inability to eat or drink, delusions, hallucinations, or a state of euphoria despite little to no sleep require immediate mental health or emergency evaluation.
How should this be understood
Depression is a condition where a depressed mood or loss of interest persists, leading to changes in sleep, appetite, concentration, and daily functioning.

Key Points

  • Definition of Depression: Depression is a condition that impairs overall functioning, characterized not only by feelings of sadness but also by a loss of interest, changes in sleep and appetite, fatigue, poor concentration, feelings of guilt, and persistent thoughts of death. We check for the possibility of anemia, thyroid issues, pain, medication side effects, and bipolar disorder. Rather than simply aiming to improve mood scores, we focus on reconnecting basic daily functions such as bathing, eating, going to work, and conversing. Thoughts or plans of suicide, inability to eat or drink, delusions, hallucinations, or a state of euphoria despite little to no sleep require immediate mental health or emergency evaluation.
  • Difference from similar terms: While burnout may be prominently linked to the context of continuous burdens such as work or caregiving, depression can affect all areas of life.
  • Reason for verification during consultation: We first check for risks of self-harm, changes suggestive of bipolar disorder, thyroid issues, anemia, and the effects of current medications, while maintaining mental health treatment. Korean herbal medicine is not presented as a replacement treatment for depression; instead, it is used concurrently to address physical burdens that hinder daily recovery, such as issues with sleep, appetite, digestion, body heat, or energy levels.

References cited on this page

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