What is a depressive episode?

A depressive episode involves at least two weeks of persistently low mood or loss of pleasure (anhedonia), accompanied by changes in sleep, appetite, energy, concentration, and sense of self-worth. Depressive episodes occur within major depressive disorder, bipolar disorder, and other conditions. Severity varies from mild (few symptoms, mild functional impairment) to severe (significant disability, possible psychotic features). Medical assessment to establish context and appropriate treatment is important.

What treatments are available for depressive episodes?

Psychological therapies — including cognitive-behavioural therapy, behavioural activation, and interpersonal therapy — have strong evidence for moderate-to-severe depression. Antidepressant medication has good evidence and may be appropriate alongside or instead of therapy depending on severity. Exercise has robust evidence as an adjunct. Lifestyle factors — sleep, nutrition, alcohol reduction — are important foundations.

How can complementary approaches support recovery from depression?

Exercise is the complementary intervention with the strongest evidence for depression — aerobic exercise comparable to antidepressant medication in mild-to-moderate presentations. Acupuncture has emerging evidence. Nutritional approaches addressing omega-3 deficiency and gut health have supporting evidence. Mindfulness-based cognitive therapy (MBCT) is a NICE-recommended approach for preventing relapse in recurrent depression. These work best as adjuncts to — not replacements for — evidence-based psychological or medical treatment.

When should I seek urgent help for depression?

If you are experiencing thoughts of suicide, self-harm, or feeling that life is not worth living, please seek support now. In the UK, call the Samaritans on 116 123 (free, 24/7), contact your GP, attend A&E, or call 999 in an emergency. You do not need to be in immediate danger to reach out — early support prevents crises.

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Depressive episode

A depressive episode is a period of persistent low mood, loss of interest, and reduced energy significantly affecting daily life. Holistic support including therapeutic movement, nutritional psychiatry, talking therapy,

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Reviewed by Dr. Ava Gardner · Integrative Medicine Researcher26 March 2026Emerging evidence

Quick answer

Do any of these feel familiar?

A depressive episode is experienced as a sustained period of low mood and loss of energy or interest that represents a significant departure from a person's usual functioning
Many describe a heaviness — physical and emotional — that persists throughout most of the day, most days
Sleep becomes disrupted, appetite changes, and concentration falters
Activities that previously provided pleasure feel flat or irrelevant
Many people carry a persistent sense of guilt or inadequacy, and find it difficult to believe that the episode will pass
The experience of depression as a physical as well as emotional state is often surprising to those encountering it for the first time

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Overview

Symptoms & Affected Systems

Contributing Factors

Supporting Lifestyle Strategies

Evidence Context

When to Seek Professional Help

Related Conditions

Major Depressive Disorder

Bipolar

Depression

Anxiety

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