Sleep disorders manifest in various forms during depression: difficulty falling asleep, trouble staying asleep, or waking up too early in the morning. In some cases, the sleep issues are so severe that an independent sleep disorder – known as insomnia – is diagnosed additionally. These nightly struggles can also be traced on a physical level. In people with depression, the sequence of sleep phases is often altered. The transitions between sleep stages are irregular, restful deep sleep is shortened, and REM sleep (the dreaming phase) often occurs earlier. This explains why those affected often perceive their sleep as unrestful despite getting enough hours of sleep, leaving them feeling even more exhausted the next day.

Conversely, chronically disrupted sleep can increase the risk of developing depression. Fatigue is therefore not just a consequence, but often a contributing cause of the illness. Treatment is tailored individually, depending on whether the depressive symptoms or the sleep problems are the primary concern.

The vicious cycle between depression and a sleep disorder occurs because the connection works in both directions. The poorer the sleep, the more severe the depressive symptoms; and the more severe the depression, the less restful the sleep. Frequently, the root cause lies far back, and both factors continue to develop in a constant interplay.

How do these reciprocal effects manifest?

• Stress and cortisol: People with depression often show elevated stress hormone levels, which makes it harder to wind down at night and lowers sleep quality.
• Quiet hours leave room for loud thoughts: Especially when trying to fall asleep, distressing or troubling thoughts force their way to the forefront. Ruminating loops intensify the fear of the next night, making falling asleep increasingly difficult.
• Daytime fatigue worsens depressive symptoms: A lack of sleep leads to irritability, concentration problems, lack of motivation, and social withdrawal—all symptoms that touch the very core of depression.
• Fewer activities lead to less sleep pressure: Feeling tired during the day often reduces the desire for hobbies, sports, or spending time with friends. This leaves fewer opportunities for positive experiences, which further dampens the mood. In turn, this lowers sleep pressure by the time evening comes.

To break the vicious cycle of depression and sleep disorders, it is crucial to address both problems. If only the depression is treated without paying attention to nightly rest, those affected often remain exhausted, and symptoms return more easily. Conversely, simply improving sleep is rarely enough if the underlying depression is left unaddressed. Therefore, a combination of psychotherapeutic approaches, medication support if necessary, and a targeted improvement of sleep hygiene is helpful. This includes consistent bedtimes, a quiet sleep environment, and evening routines that prepare both body and mind for rest. A structured daily routine and regular physical activity also play an important role, as they can build sleep pressure and stabilize your mood. With a holistic approach, it is possible to interrupt the way depression and sleep problems reinforce each other, allowing you to regain energy and quality of life in the long run.

In addition, we recommend 3 quick exercises that can be helpful when dealing with concurrent depression and sleep problems:

• Introduce a "worry hour": Set a fixed, earlier time during the day to intentionally allow yourself to ruminate. Write down your thoughts in a notebook. If worrying thoughts resurface in bed at night, you can defer them to your designated worry hour and address them actively then.
• Use daily energy boosters: Identify activities that make you feel good, such as short walks or listening to an audiobook in the evening. This boosts your mood and increases your natural sleep pressure.
• Keep a gratitude journal: Make a conscious effort each evening to write down positive or beautiful moments from your day, no matter how small. This practice can reduce stress and quiet down evening rumination.

Studies show that controlled sleep deprivation can have a short-term mood-lifting effect on certain forms of depression. As a rule, this method is only used in an inpatient setting and should always be conducted under medical supervision. Under this approach, individuals affected are intentionally kept awake for a full or half night, two to three times a week, accompanied by trained staff. It is equally important not to sleep the following day. For about 60% of patients, mood and motivation noticeably improve as early as the next morning.

However, because sleep deprivation only provides short-term relief and is not suitable for everyone, long-term treatment options remain crucial. This is where a digital application like deprexis can help to sustainably improve your mood and support you in returning to a more active daily life.

You can access early, personalized help with deprexis, a digital therapy program for the treatment of depression. To help you find your way back to greater lightness step-by-step, deprexis supports you with a personalized program, exercises for managing low moods, and practical self-care advice.

deprexis is available to you free of charge with a prescription – the costs are fully covered by your health insurance. This means your doctor or psychotherapist can prescribe deprexis for you, and you will receive an activation code for the program. As soon as you have the code, you can easily redeem it on our website and start using deprexis right away.