Sleep and stress are intricately interconnected.
When you’re chronically stressed, your body releases chemicals that can interfere with you ability to fall asleep and stay asleep. If you worry, ruminate, and feel anxious in the evening, you may further trigger the stress response just when you need to calm your mind for a good night’s rest.
On the other hand, if you’re not getting sufficient sleep, your body will increase the production of stress chemicals. That’s because counter-chemicals are released in deep sleep which signal your body to turn down the production of stress hormones. So if you regularly deprive yourself of sleep, you’ll increase your stress levels.
Either way, you can get stuck in a vicious cycle. Poor sleep leads to more stress which leads to more disturbed sleep. Or, more stress leads to poor sleep which leads to more stress.