Sleep and Mental Health: Why Rest Supports Emotional Well-Being
Sleep and mood are tangled together. A rough night makes everything feel harder, and a heavy mind makes sleep harder to find. Researchers now think the link runs both ways, which is good news: improving sleep can ease some mental health symptoms, and caring for your mind can improve sleep.
Key takeaways
- Poor sleep and low mood or anxiety feed each other.
- Treating insomnia can help improve depression and anxiety symptoms.
- If you feel hopeless or think about harming yourself, seek urgent help right away.
A two-way street
People with depression and anxiety are much more likely to have disturbed sleep, and long-lasting insomnia can raise the chance of developing depression later. Sleep loss makes the brain’s emotional centres more reactive, so small problems feel bigger and it is harder to calm down. It is not that bad sleep causes every mental health problem, but it is a strong ingredient.
What it can look like
- Taking a long time to fall asleep because your mind will not slow down.
- Waking very early and being unable to go back to sleep, which is common in depression.
- Sleeping far more than usual and still feeling flat.
- Nightmares or restless sleep after stress or trauma.
What helps
Cognitive behavioral therapy for insomnia (CBT-I) is the main non-drug treatment and has been shown to help people whose insomnia comes alongside depression or anxiety. Regular sleep and wake times, daylight, exercise, limiting alcohol and a calm wind-down all support both sleep and mood. See our guide to falling asleep faster and sleep and anxiety.
Medication and sleep
Some antidepressants and other psychiatric medicines affect sleep, making you sleepier or more alert. Do not stop or change medication yourself. If sleep got worse after starting one, talk to the prescriber.
When to get help
See a doctor or mental health professional if low mood, worry or trouble sleeping lasts more than a couple of weeks or interferes with daily life. If you ever feel hopeless or think about harming yourself, contact your local emergency number or a crisis service right away, or reach out to someone you trust and tell them how you are feeling.
Frequently asked questions
Can fixing my sleep cure depression?
Not on its own, but treating insomnia can reduce symptoms and make other treatments work better.
Why do I sleep so much when I feel low?
Oversleeping can be a symptom of depression or other conditions. If it lasts, speak to a clinician.
References and further reading: Reviews on insomnia and depression in JAMA Psychiatry and Sleep Medicine Reviews; American Academy of Sleep Medicine guidance on CBT-I. This page is educational and not a substitute for professional care.