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Published on: 7/21/2026

Why does stress make it hard to sleep, and lack of sleep increase stress?

Stress and sleep are closely connected in a two-way cycle: stress makes it harder to fall and stay asleep, and poor sleep increases stress hormones like cortisol, leaving you feeling more anxious the next day. This loop can be difficult to break without identifying what's driving it.

Common signs stress is affecting your sleep include racing thoughts at bedtime, waking during the night, early morning awakenings, and daytime fatigue or irritability. Underlying issues—such as anxiety disorders, insomnia, or hormonal imbalances—can also play a role.

Because the causes vary from person to person, understanding your specific symptoms is the first step toward relief. A free, instant, online symptom check can help you pinpoint what may be behind your sleep struggles and guide you on smart next steps—whether that's lifestyle changes, seeing a doctor, or exploring treatment options. It takes just a few minutes and could save you weeks of guessing.

Reviewed for medical accuracy: 07/20/2026

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Explanation

Stress and sleep are closely connected and can affect each other in a cycle. When you are stressed, your body releases chemicals that can make it hard to relax and fall asleep. This is because stress can make your brain very active, which keeps you awake at night.

When you don't get enough sleep, it can make you feel more stressed. Lack of sleep can make it harder for your body to handle stress because it can affect how your brain works, especially the parts that help you deal with stress.

Here's how it works:

  • Stress makes it hard to sleep: Stress can cause your brain to stay alert, making it difficult to fall asleep. Your body releases stress hormones that keep you awake.
  • Lack of sleep increases stress: When you don't sleep well, your body and mind don't get the rest they need, which can make you feel more stressed the next day.

Breaking this cycle can be tough, but understanding how stress and sleep affect each other is a good first step. If you're experiencing symptoms related to stress or sleep problems, you can use our free AI symptom checker to better understand what might be happening with your health and when to seek professional care.

(References)

  • Lo Martire V, Caruso D, Palagini L, Zoccoli G, & Bastianini S. (2020). Stress & sleep: A relationship lasting a lifetime. Neuroscience and biobehavioral reviews, 31491473.

  • He M, Li Y, Chen M, Li H, Liang C, Chen Y, et al. (2024). Insomnia and stress: the mediating roles of frontoparietal .... Brain imaging and behavior, 39269599.

  • Kalmbach DA, Anderson JR, & Drake CL. (2018). Stress Impact on Sleep: Pathogenic Sleep Reactivity & Insomnia. Journal of sleep research, 29797753.

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