Depression can have many symptoms and take many forms. But one of the more common symptoms may not feel like a mental health symptom at all. Depression affects sleep, often in complex, biological ways.
Some people with depression struggle to fall asleep or wake up multiple times during the night. But for others, the problem is the opposite — they sleep constantly. Twelve hours, fourteen hours, sometimes more. They wake up exhausted, go through the day in a fog, and collapse back into bed as soon as possible.
If you’re sleeping excessively and still feeling drained, it may be a symptom of depression. Depression can fundamentally change how your body regulates sleep, and while some parts of it are directly related to thoughts and feelings, others are related to the way that depression rewires and affects hormones in the brain.
How Depression Affects Sleep Regulation
Depression doesn’t just make you feel sad or hopeless. It disrupts the biological systems that control sleep, energy, and alertness.
Your brain relies on neurotransmitters like serotonin, dopamine, and norepinephrine to regulate mood, motivation, and wakefulness. Depression typically involves imbalances in these chemicals, which means the systems that keep you alert and energized during the day aren’t functioning properly. When these neurotransmitters are depleted or dysregulated, your brain struggles to maintain normal wakefulness, and sleep becomes the default state.
Depression also affects your circadian rhythm — the internal clock that tells your body when to sleep and when to wake up. When this rhythm is disrupted, you can feel tired all the time regardless of how much you sleep. Your body loses the ability to distinguish between rest time and active time, so exhaustion becomes constant.
The result is hypersomnia, which is the clinical term for excessive sleeping. People with hypersomnia sleep far more than the typical seven to nine hours but wake up feeling just as tired as when they went to bed. The sleep isn’t restorative because the underlying brain chemistry issues remain unresolved.
Depression and Fatigue
Depression causes profound physical and mental fatigue that goes beyond ordinary tiredness. Everything feels harder — getting out of bed, making decisions, holding conversations, even basic tasks like showering or eating. This overwhelming exhaustion makes sleep feel like the only relief available.
Part of this fatigue comes from the mental and emotional work depression creates. Your brain is constantly processing negative thoughts, managing feelings of worthlessness or hopelessness, and fighting against the weight of despair. That takes enormous energy, even if you’re not consciously aware of it. By the end of the day — or even by mid-morning — your brain is depleted, and sleep becomes the easiest escape.
Depression also reduces motivation and interest in activities that would normally energize you. When nothing feels rewarding or enjoyable, there’s no reason to stay awake. Sleep becomes preferable to facing another day where everything feels pointless.
For some people, excessive sleep also functions as avoidance. When you’re asleep, you’re not dealing with the pain, the negative thoughts, or the overwhelming sense that nothing will get better. Sleep offers a temporary reprieve from the emotional burden of depression, which makes it incredibly appealing even when you’ve already slept for hours.
Why Some People Sleep More While Others Sleep Less
Not everyone with depression experiences hypersomnia. Some people develop insomnia instead, lying awake for hours unable to shut off their racing thoughts or falling asleep only to wake up repeatedly throughout the night.
The type of depression you have can influence which sleep pattern emerges. People with atypical depression — a subtype characterized by mood reactivity, increased appetite, and sensitivity to rejection — are more likely to experience hypersomnia. Those with melancholic depression, which involves a persistent inability to feel pleasure and early morning waking, tend toward insomnia instead.
Your brain chemistry, stress levels, and individual physiology also play a role. Some people’s bodies respond to depression by shutting down and conserving energy, leading to excessive sleep. Others experience heightened anxiety or rumination that keeps them awake despite their exhaustion.
Treatment Options for Depression-Related Hypersomnia
If depression is causing you to sleep excessively, treatment needs to address both the depression and the sleep disturbance.
- Therapy — particularly Cognitive Behavioral Therapy (CBT) — helps identify and challenge the negative thought patterns that fuel depression and the behaviors that reinforce excessive sleep. CBT for insomnia can be adapted to address hypersomnia by focusing on sleep restriction, activity scheduling, and gradual reintroduction of structure and routine.
- Light therapy can help reset your circadian rhythm, especially if you’re sleeping through daylight hours. Regular exposure to bright light in the morning signals your brain that it’s time to be awake and alert, which can gradually restore a more normal sleep-wake cycle.
- Establishing a consistent sleep schedule — even when you don’t feel like it — helps retrain your body’s internal clock. Going to bed and waking up at the same time every day, limiting naps, and creating boundaries around sleep can gradually reduce hypersomnia.
Another option is exercise. Physical activity, though difficult when depression saps your energy, can improve both mood and sleep quality. Even short walks or gentle movement can help regulate your sleep cycle and boost the neurotransmitters that depression depletes.
Getting Help for Depression and Sleep Problems
If you’re sleeping excessively and feeling trapped in a cycle of exhaustion and depression, reaching out for professional support can help you break that pattern. Depression-related hypersomnia responds well to treatment, but it requires addressing the underlying depression rather than just trying to force yourself to sleep less.
Flourish Psychology’s therapists in Brooklyn specialize in treating depression and understand how sleep disturbances complicate recovery. We use evidence-based approaches like CBT and other modalities to help you regain control over your sleep, your energy, and your life.
You can reach Flourish Psychology at 917-737-9475 to schedule a consultation, or connect through the website to learn more about services and availability.