Sleep Disorders and Depression: Why Falling Back Can Hit Hard

Sleep disorders and depression often travel together. Depression can cause insomnia, early waking or oversleeping, and ongoing sleep problems such as insomnia, sleep apnea or a body clock that is out of sync can make low mood harder to shift. When the clocks fall back and evenings get darker, both problems can flare at the same time, so it helps to look at them together.

This article is for adults who notice their sleep and mood slipping in late fall, people already living with depression who want to protect their sleep through the time change, and family members trying to make sense of a loved one's tiredness and withdrawal. It explains the connection, gives a step-by-step plan, and lists signs that it is time to get help.

How are sleep disorders and depression connected?

Sleep disorders and depression are connected because each one can trigger or worsen the other. The National Institute of Mental Health (NIMH) lists "difficulty sleeping, waking too early in the morning, or oversleeping" and "fatigue, lack of energy, or feeling slowed down" among the symptoms of depression.

The link runs the other way too. The American Academy of Sleep Medicine (AASM) notes that insomnia is most often associated with another problem and that depression is a frequent cause. In practice, a few weeks of broken sleep can leave someone irritable, foggy and less able to cope, which can deepen a low mood that was already there.

This two-way pattern matters because treating only one side often leaves the other untouched. Someone whose mood improves may still be stuck in an insomnia habit, and someone who fixes their sleep schedule may still have untreated depression.

Which sleep problems commonly show up alongside depression?

Several sleep problems commonly show up alongside depression, and they do not all look the same. Knowing the type helps you describe it clearly to a clinician.

• Insomnia: trouble falling asleep, staying asleep or waking too early. The AASM describes chronic insomnia as happening at least three times a week for at least three months.
• Oversleeping: sleeping long hours yet still feeling unrefreshed, which is common in some forms of depression.
• Sleep apnea: breathing that stops and starts during sleep. The National Heart, Lung, and Blood Institute (NHLBI) lists sleep apnea symptoms such as loud snoring, gasping for air, daytime sleepiness, fatigue, headache and insomnia.
• Circadian rhythm problems: a body clock that runs out of step with your schedule, discussed below.

Because fatigue, poor concentration and low energy overlap across all of these, a tired, low person may have depression, a sleep disorder, or both.

Why can the time change make sleep and mood worse?

The time change can make sleep and mood worse because it shifts the light cues your body clock depends on. The AASM explains that light and dark are the most powerful timing cues for the body clock, so an abrupt one-hour change can leave you out of step for a while.

The National Institute of Standards and Technology (NIST) lists the end of daylight saving time as 2:00 a.m. on the first Sunday of November, when clocks go back one hour. That means earlier sunsets and darker late afternoons for the rest of the fall.

The NHLBI describes circadian rhythm disorders as a body clock that is out of sync with the environment, with symptoms that can include extreme daytime sleepiness, decreased alertness, and problems with memory and decision-making. For someone already prone to depression, less evening light and a scrambled sleep schedule can add up.

What are the signs that sleep is affecting your mood?

The signs that sleep is affecting your mood are usually gradual. Watch for patterns that last more than a week or two rather than a single bad night.

• You dread bedtime or feel wide awake as soon as you lie down.
• You wake at 3 or 4 a.m. and cannot get back to sleep.
• You sleep nine or ten hours and still wake exhausted.
• Small frustrations feel bigger than usual, or you snap at people.
• You have stopped doing things you normally enjoy because you are too tired.
• Someone has told you that you snore loudly or seem to stop breathing at night.

NIMH notes that depression symptoms are present most of the day, nearly every day, for at least two weeks. If your low mood and sleep problems have reached that point, it is worth an evaluation rather than waiting it out.

How can you protect your sleep and mood when the clocks change?

You can protect your sleep and mood when the clocks change by keeping your schedule steady and getting light at the right times. These steps follow advice from the AASM and MedlinePlus, the consumer health site of the National Library of Medicine.

1. Set clocks the evening before. The AASM suggests setting clocks back on Saturday evening and keeping your normal bedtime.
2. Keep the same wake time every day. MedlinePlus advises going to bed and waking at the same time each day, including weekends.
3. Get daylight in the morning. Step outside soon after waking, even for ten minutes on a cloudy day.
4. Avoid late naps. MedlinePlus recommends avoiding naps after 3 p.m.
5. Limit caffeine later in the day. Afternoon and evening caffeine can delay sleep.
6. Get out of bed if you cannot sleep. MedlinePlus suggests getting up after about 20 minutes and doing something calm until you feel sleepy.
7. Plan something for the dark evenings. A short walk before sunset, a call with a friend or a regular hobby can keep evenings from turning into long, isolated stretches.

Give yourself a week or two to adjust. If sleep is still off after that, it may be more than the time change.

What should you track before talking to a clinician?

Before talking to a clinician, track your sleep and mood for about two weeks. The AASM says a two-week sleep diary can help a clinician understand insomnia.

Use this checklist:

• Bedtime, time you fell asleep, wake-ups during the night and final wake time
• Naps, caffeine, alcohol and exercise each day
• A daily mood rating from 1 to 10
• Whether you snore, gasp or wake with a headache (ask a bed partner if you can)
• Medicines and supplements you take
• Anything that changed recently, such as work hours, stress or a loss

When you talk to the clinician, you might say: "For the last few weeks I have been waking at 4 a.m. most nights, and I feel flat most of the day. I want to know whether this is depression, a sleep problem or both." That one sentence gives them a lot to work with.

How are sleep disorders and depression treated together?

Sleep disorders and depression are often treated together, with a plan that addresses both. The AASM recommends cognitive behavioral therapy for insomnia (CBT-I) for chronic insomnia disorder in adults, and notes it can be delivered in person, by video or online.

Depression treatment may include talk therapy, medication or both, and NIMH notes that finding the best treatment can take some trial and error. If sleep apnea is suspected, a clinician may refer you for a sleep evaluation, since the AASM says a sleep study is used when apnea or another sleep disorder is suspected.

A good plan usually means one person, or one coordinated team, looking at the whole picture rather than treating tiredness, mood and snoring as separate problems.

When should you get help sooner?

You should get help sooner if sleep loss or low mood is affecting your safety or daily functioning. Red flags include:

• Thoughts of death, suicide or self-harm
• Falling asleep while driving or at work
• Pauses in breathing, choking or gasping during sleep
• Not being able to work, study or care for others
• Using alcohol or other substances to get to sleep
• Sleeping very little while feeling unusually energetic or driven

Any thoughts of suicide or self-harm need same-day attention. The crisis information at the end of this article explains how to reach help right away.

What should Texans know about seasonal sleep and mood changes?

Texans can still notice seasonal sleep and mood changes, even with milder winters than northern states. Earlier sunsets after the clocks fall back, busy holiday schedules and less time outdoors can all affect sleep in Dallas–Fort Worth and across the state.

Lyte Psychiatry offers telehealth visits to patients who are physically located in Texas at the time of the visit. That can make it easier to fit an appointment into a workday when you are already short on sleep. In-person visits are available at Lyte Psychiatry's clinic in Pantego, in the Dallas–Fort Worth area.

Getting support in Texas

Getting support in Texas starts with an evaluation that looks at both sleep and mood. Lyte Psychiatry offers therapy, psychiatric evaluation and medication management in Texas, and you can learn more on the depression care page or the Texas telehealth page.

Most new patients are seen within 1–2 business days. Weekend appointments are limited. Availability, insurance and clinician fit require confirmation. All Lyte Psychiatry services are available in Spanish.

For more reading, see how depression and sleep affect each other, CBT-I for insomnia without sleeping pills, how to reset your body clock after falling back and what to track in a sleep diary.

If you are in a mental-health crisis in the United States, call or text 988. Call 911 for immediate danger.

Educational information, not a diagnosis or individual treatment plan.