I've written about the link between insomnia and depression a number of times.
New research has now found then when insomnia is combined with nightmares, symptoms of depression can become even worse.
Researchers in Japan found that 71% of study participants with insomnia experienced nightmares 1 or more times per week compared to 29% of healthy sleepers.
They also found that individually, insomnia and nightmares were both linked to more severe symptoms of depression.
Those who suffered from insomnia and nightmares at the same time experienced even more severe symptoms of depression.
Interestingly, researchers found that symptoms of depression didn't get worse as the number of nightmares experienced per week increased. This suggests that just the presence of nightmares is enough to exacerbate depression symptoms.
Source: Sleep Journal
Last updated: July 16, 2014