A genotyping study involving tens of thousands of individuals in Finland identified a significant overlap between genetic factors linked to nightmares and those associated with anxiety, depression, posttraumatic stress disorder, and neuroticism. The study also found that individuals with insomnia were more likely to experience frequent nightmares. The research was published in Translational Psychiatry. Nightmares are vivid and unsettling dreams that typically result in feelings of fear, distress, or anxiety upon awakening. They most often occur during the rapid eye movement (REM) stage of slee…