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Energy & Physical

Fatigue

Persistent tiredness, exhaustion, or lack of energy that isn't proportionate to activity level and doesn't fully resolve with rest.

  • “why am I always tired”
  • “exhausted no matter how much I sleep”
  • “no energy to do anything”
  • “constantly drained”

Also called always tired, exhaustion, no energy, feeling drained, low energy, chronic tiredness.

Can be part of

Major Depressive Disorder, Persistent Depressive Disorder and 1 more

Not always mental health

7 other possible causes, like sleep disorders are common causes

Get help if

Fatigue persists for weeks despite adequate sleep

What it can look like

Everyday moments people describe.

Some people describe waking up after a full night's sleep feeling as tired as when they went to bed.

Where it can come from

Many things can cause this. Only a clinician can tell which applies to you.

Fatigue in Major Depressive Disorder

Fatigue is one of the most common symptoms, often present even when mood symptoms are subtle.

How clinicians describe it

  • “Fatigue or loss of energy nearly every day”
About Major Depressive Disorder

Often comes with

Check in with yourself

A short, validated questionnaire can help you put words to it before an appointment.

PHQ-9 Depression Screener

Includes questions about energy and fatigue

When to get help

  • When fatigue persists for weeks despite adequate sleep
  • When it significantly impacts daily functioning
  • When accompanied by other symptoms
  • When it represents a notable change from your baseline
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General information about a common experience, not a diagnosis or medical advice. What you are going through may have many explanations; a qualified professional can help you understand yours. Reviewed 2025-01-15.