Depression causes negative thoughts to come into your mind when you do not want them. During the day, it is easier to drown out these thoughts by staying active and keeping your mind busy. When you try to fall asleep, there are no distractions or activities to drown out these intrusive thoughts, and you are at their mercy.
This can be one of the most frustrating effects of depression. Try some of the simple interventions covered in the next few pages to help you get to sleep and stay asleep.