People with certain mood disorders and PTSD often have difficulty sleeping, leading some scientists to believe that lack of dreaming may be a contributing factor to their illnesses.
काही मानसिक अवस्थेत झोप मिळत नाही शास्त्रज्ञ म्हणतात स्वप्न न पडल्याने आजार उद्भवण्याची शक्यता असते.