Insomnia and Depression Together: Why Your Brain Can’t Sleep and How CBT-I, Behavioural Activation, and ACT Treat Both Conditions

This guide explains why insomnia and depression commonly occur together, how they reinforce each other, and why sleep tips alone don’t work. It details the insomnia–depression loop, nighttime rumination, early-morning awakenings, and the emotional weight of this combination. The article then outlines evidence-based treatment using Cognitive Behavioural Therapy for Insomnia (CBT-I), Behavioural Activation (BA), and Acceptance and Commitment Therapy (ACT), showing how these approaches improve sleep, mood, energy, and daily functioning.

By Graeme Thompson, Registered Clinical Counsellor in British Columbia

11/18/20256 min read

Introduction: When Sleep Is Broken and Everything Feels Heavy

There’s a specific kind of exhaustion that comes from living with both insomnia and depression.
It’s not just being tired.
It’s not just being low.

It’s waking up after a terrible night and feeling like you’re moving through molasses. It’s lying awake with a heavy mind, replaying fears and regrets, then dragging yourself into the day feeling disconnected from everything that used to matter.

People often describe this combination as:

  • “My body is drained, but my mind won’t stop.”

  • “I can’t fall asleep because my thoughts get darker at night.”

  • “In the morning, I can’t get out of bed even if I slept.”

  • “I feel wired and hopeless at the same time.”

As a CBT-I therapist in British Columbia, I see this pattern all the time. Insomnia and depression don’t just coexist — they feed each other, reinforce each other, and make each other harder to treat.

This article will walk you through:

  1. Why insomnia and depression intertwine

  2. What actually happens in your brain and body

  3. Why common tactics fail when both are present

  4. How CBT-I, Behavioural Activation, and ACT treat both at the same time

My hope is that understanding this pattern gives you back a sense of possibility — because insomnia with depression is treatable, even when it feels entrenched.

Why Insomnia and Depression Show Up Together

What Is Insomnia, Really?

Insomnia isn’t defined by how many hours you sleep. It’s defined by the struggle:

  • Trouble falling asleep

  • Trouble staying asleep

  • Waking too early

  • Feeling unrefreshed

  • Daytime impairment

Insomnia is typically maintained by:

  • Conditioned wakefulness: the bed becomes a cue for rumination

  • Sleep effort: trying too hard to sleep

  • Irregular routines

  • Worry about sleep

Insomnia isn’t a character flaw. It’s a learning problem — one your nervous system has gotten very good at repeating.

What Is Depression, Really?

Depression is more than sadness.
It often includes:

  • Loss of interest

  • Low motivation

  • Hopelessness

  • Fatigue

  • Slowed thinking

  • Social withdrawal

  • Difficulty initiating anything, including sleep routines

Depression shrinks life. It makes even small efforts feel enormous. It tells you that nothing will help, so why bother trying?

This mindset has massive implications for sleep.

The Insomnia–Depression Feedback Loop

This is where things get tangled.

Why insomnia worsens depression
  • Poor sleep impairs emotion regulation

  • Mood becomes more fragile

  • Worry and rumination intensify

  • Energy drops further

  • Everything feels heavier

Why depression worsens insomnia

Depression disrupts almost every behavioural cue that keeps sleep on track:

  • Staying in bed for long periods

  • Napping

  • Avoiding activity

  • Lack of sunlight exposure

  • Irregular sleep-wake times

  • Evening withdrawal and rumination

Your sleep drive weakens.
Your circadian rhythm drifts.
Your bed becomes a place where you stew.

The loop becomes:

Poor sleep → lower mood → less activity → worse sleep → lower mood → repeat.

This is not a motivational failure. It’s a biological and behavioural cycle.

What Insomnia Feels Like Inside Depression

This is the part people rarely explain.

Nighttime: The Heavy Brain

Many describe nighttime as the hour when depression speaks the loudest:

  • “What’s the point?”

  • “Everyone else is doing better than me.”

  • “Why can’t I just function?”

  • “What if I never get better?”

Rumination becomes a form of self-punishment.
The quiet of night can be the perfect environment for a mind that’s already hurting.

Early-Morning Awakenings

This is especially characteristic of depression.

Waking at 3–5 AM with:

  • dread,

  • a sinking feeling,

  • or a sense of guilt,

  • even if you should be able to sleep longer.

Daytime: Tired and Numb

After a rough night, the day often feels:

  • heavy

  • slow

  • unmotivated

  • foggy

  • empty

You might spend hours in bed or on the couch, not because you’re lazy — but because depression has turned effort into a mountain.

This inactivity then weakens sleep drive… and the cycle deepens.

Why Typical Sleep Advice Fails When Depression Is Present

Sleep Hygiene Isn’t Built for Depression

Advice like:

  • avoid screens

  • reduce caffeine

  • keep your room dark

  • stick to a routine

…is fine, but it doesn’t fix:

  • hopelessness

  • rumination

  • fatigue so intense that “routine” feels impossible

  • staying in bed all morning

  • the emotional exhaustion that drives avoidance

You cannot out-sleep-hygiene depression.

Pure CBT-I Can Feel Harsh For a Depressed Nervous System

Classic CBT-I requires:

  • consistent wake times

  • leaving the bed when awake

  • staying out of bed until sleepy

  • no napping

  • sleep restriction

All effective — but difficult when a client feels:

  • “What’s the point?”

  • “I’m too tired to get out of bed.”

  • “I can’t tolerate being awake and alone with my thoughts.”

Depressed clients often feel like they’re “failing” CBT-I.
But the problem isn’t the client — it’s that treatment needs to be adapted.

Treating Insomnia When Depression Is Also Present

Here’s the part most articles gloss over.
This is the heart of the work.

1. Step One: Map the Loop, Not Just the Symptom

In therapy we map three things:

A. Sleep patterns

  • Time in bed

  • Time out of bed

  • Middle-of-the-night wakefulness

  • Early awakenings

  • Sleep efficiency

B. Mood patterns

  • Low energy periods

  • Hopelessness

  • Negative thought cycles

  • Withdrawal patterns

  • Activity levels

C. Behaviour patterns

  • Staying in bed during the day

  • Napping

  • Cancelling activities

  • Avoiding morning responsibilities

  • Oversleeping

  • Rumination at night

Clients often say, “I’ve never seen it laid out like that before — this actually makes sense.”

Mapping the loop is the beginning of real change.

2. Using CBT-I — Gently, Flexibly, and Humanely

CBT-I is still the gold standard for insomnia.
But with depression, we adjust how we deliver it.

A. Start with the wake time

The single most powerful intervention for both sleep and mood is:

Wake up at the same time every day, even after a bad night.

This:

  • strengthens circadian rhythm

  • improves mood regulation

  • reduces rumination

  • increases consistency

  • stabilizes sleep drive

We do this before anything else.

B. Introduce sleep restriction carefully

Instead of aggressive restriction, we use collaborative restriction:

  • Reduce time in bed enough to improve sleep pressure

  • But not so much that the client feels punished or overwhelmed

  • Keep the window stable for several days, then adjust gradually

C. Gentle stimulus control

We still use the principle, but we soften the edges:

  • Leave the bed if awake too long

  • Move to a comforting space (soft light, blanket, quiet activity)

  • Avoid harsh or effortful tasks

  • Return to bed only when sleepy

This feels doable, not punishing.

3. Behavioural Activation: Treating the Depression Side of the Loop

Behavioural Activation (BA) is one of the strongest evidence-based treatments for depression — and incredibly useful for insomnia.

Why it works:

  • Depression shrinks your life

  • Inactivity weakens sleep drive

  • Staying in bed reinforces hopelessness

  • BA reverses this process

BA Treatment Focus

  • Morning “anchors” (shower, sunlight, breakfast, walk)

  • Small meaningful activities during the day

  • Reintroducing pleasure, connection, and accomplishment

  • Reducing time spent in bed outside of sleep

  • Increasing natural light exposure

  • Building gentle structure

Think of BA as rebuilding the scaffolding that sleep attaches itself to.

4. ACT: The Glue That Holds It All Together

ACT (Acceptance and Commitment Therapy) is essential when treating insomnia with depression because it helps a person work with:

  • rumination

  • low motivation

  • harsh self-talk

  • nighttime fear

  • hopelessness

A. Defusion

Noticing depressive thoughts (“I’m worthless,” “what’s the point?”) as thoughts — not truths.

B. Acceptance

Making room for discomfort (fatigue, sadness, anxiety) without letting it dictate behaviour.

C. Present-moment grounding

Especially useful at night when rumination spikes.

D. Values

Asking:
“If your sleep and mood improved, what kind of life would you want that improvement to support?”

E. Self-compassion

A gentle, essential antidote to the shame and self-blame that fuel the insomnia–depression cycle.

ACT helps people do:

  • the CBT-I steps

  • the BA steps

  • the daily life steps

…even when they don’t feel motivated or hopeful.

Case Example: Emma’s Story
Her Pattern
  • Depression slowly took over her motivation

  • She was spending 12–14 hours a day in bed

  • Sleep was fragmented

  • She woke early with dread

  • She stopped seeing friends

  • She believed, “I’m failing at everything, including sleep”

Our Work Together
  1. Mapping her sleep–mood loop

  2. Setting a gentle, realistic wake time

  3. Introducing a modest sleep window

  4. Creating a morning routine anchored in her values

  5. BA: reintroducing small meaningful activities

  6. ACT: working with hopelessness and self-judgment

  7. Nighttime plan for rumination and early awakenings

Her Outcome
  • Wake time became stable

  • Sleep became more consolidated

  • Mood improved gradually

  • Daytime routines returned

  • She started meeting a friend for weekly walks

  • She stopped describing herself as “broken”

Her sleep didn’t become perfect.
Her life became bigger than the insomnia.

When to Seek Help

You might benefit from therapy if:

  • Insomnia has lasted over a month

  • You wake early with a heavy mood

  • You can’t get going in the morning

  • You spend long periods in bed during the day

  • You feel stuck in rumination

  • You’ve tried basic sleep tips without change

  • You feel overwhelmed, hopeless, or numb

If this is where you’re at, it doesn’t mean you’re failing.
It means your nervous system is exhausted — not you.

If You’re Ready to Change the Pattern

I work with clients across British Columbia who are dealing with insomnia, depression, or both.
If you’re struggling with this combination, you don’t have to figure it out alone.

We can look at your sleep, your mood, and your routines — and build a treatment plan that is compassionate, realistic, and effective.

You can book a free 15-minute consultation through my website.

Sometimes the first step toward feeling better is understanding that nothing is wrong with you — you’ve just been stuck in a loop that we can start unwinding together.

This article is helpful for people asking:

  • “Why do insomnia and depression happen together?”

  • “Why do I wake up early when I’m depressed?”

  • “How do I treat insomnia caused by depression?”

  • “What does CBT-I do for depression?”

  • “How can I fix sleep problems if I’m depressed and unmotivated?”

  • “Who treats insomnia and depression in British Columbia?”