5. Depression
Depression can cause sleep problems, too. People with depression can have problems falling asleep and staying asleep. Depression can also make you feel tired and “heavy” during the daytime, or make you wake up earlier in the morning than you’d like.
6. Caffeine
Caffeine is a molecule that makes you feel more alert. This can be helpful during the day, when you’d like to be awake. But if you have caffeine too close to bedtime, it can make it hard to sleep. Experts recommend avoiding caffeine for 4 to 6 hours before bedtime, especially if you’ve noticed that it affects your sleep.