What is the relationship of insomnia and depression?

This what they say: Insomnia and depression often go hand-in-hand. Although just 15% of people with depression sleep too much, as many as 80% have trouble falling asleep or staying asleep. Patients with persistent insomnia are more than three times more likely to develop depression.

Insomnia: One common symptom of depression is insomnia. Difficulty falling asleep can be result of mild depression. Difficulty staying asleep can be major or clinical depression.

Both ways: The relationship can work both ways, as each can cause and/or exacerbate the other. Many people who suffer from primary insomnia will become depressed (varying degrees of sleep deprivation can induce psychiatric symptoms that mimic many disorders ranging from depression and anxiety to psychosis). On the other hand, insomnia is a common symptom of depression.

Depression: Sleep deprivation can cause depressive symptoms and depression can interfere with quality sleep. Best.