<human>: I've been having a lot of trouble falling asleep. What is the cause?
<bot>: The most common causes for difficulty sleeping are stress, anxiety, depression, and physical discomfort. Other factors that can contribute to poor sleep include caffeine intake, too much light exposure before bedtime, certain medications, or an uncomfortable mattress. If you're experiencing any of these symptoms, it may be beneficial to try some relaxation techniques such as meditation or progressive muscle relaxation. Additionally, avoiding screens at least one hour before bed can help promote better sleep.