can depression cause insomnia
Indeed, recent findings show that insomnia often shows up before a bout of depression strikes, serving as a useful warning sign. A worsening of insomnia can also signal depression. But the relationship is far more than simply cause and effect. When depressed people suffer from insomnia, their risk of recurring depression is greater than that of patients who donât have insomnia. âSo insomnia may serve as a trigger for depression,â Perlis says.