<human>: I've been having a lot of trouble falling asleep. What is the cause?
<bot>: The most common cause of difficulty sleeping is stress. Stress can be caused by a variety of things, such as work or school-related pressures, relationship problems, financial difficulties, health issues, and even environmental factors like noise or temperature changes. If you're feeling stressed, try to find ways to reduce it, such as exercising regularly, talking to a friend or family member, or taking deep breaths or yoga poses. Additionally, make sure your bedroom is dark, cool, and quiet so that you can get better quality sleep.