Psychological Illness:
conditions that compromise mental well-being, either temporarily or chronically. A number of sleep issues may arise as the result of psychiatric disorders. They often go hand in hand. In some instances, sleep problems even help to define psychiatric disorders, as is the case with Generalized Anxiety Disorder, Depression and Bi-Polar Disorder. Mental illness is the leading cause of insomnia. Other sleep problems such as hypersomnia, nightmares, parasomnias, or circadian disturbance also plague those with mental illness. If the psychiatric condition is chronic, related sleep issues may need to be treated over time.

Sleep-Related Features
  
Insomnia: the inability to sleep often arises from anxiety and depression but is also related to other psychiatric disorders
Hypersomnia: sleeping too much may result from medications to treat a mental health disorder. Depression and the depressive phase of bi-polar disorder are particularly likely to impose hypersomnia.
Parasomnia: Nightmares commonly plague those with PTSD. Parasomnia events at the onset of sleep or when awakening disturb those with dissociative disorders.
Circadian Disturbance: disruption in the timing of sleep tends to occur more in those with Bi-polar disorder or psychotic conditions.


Psychological Illnesses That Impact Sleep
    The majority of psychiatric illnesses impact sleep in some manner. Poor sleep worsens symptoms. Sometimes, sleep problems may even help to define a mental health condition. The following list, though not comprehensive, briefly describes the most common impact certain mental health conditions have on sleep:

Anxiety Disorder:
Insomnia and frequently disturbed sleep related to nighttime stress. Daytime sleepiness as a result of medications to treat anxiety.
Bi-polar Disorder: Insomnia during the manic phase of this condition. Hypersomnia during the depressive phase. Daytime tiredness related to medications to treat it.
Personality Disorders: Insomnia associated with Borderline Personality Disorder. Insomnia, frequent sleep disturbance or hypersomnia during symptomatic periods of any personality disorder.
Major Depression and Dysthymia: Insomnia or hypersomnia related to depressive symptoms or anxiety. Daytime sleepiness related to medications to treat the depressive disorder.
Dissociative Disorder: Parasomnia events related to symptoms of the disorder (displaced memories of an underlying trauma).
Obsessive-Compulsive Disorder: Insomnia related to nighttime OCD behaviors or related anxiety. Daytime tiredness from sleep deprivation or from medications to treat OCD.
Post-Traumatic Stress Disorder: Insomnia related to nighttime stress. Severe nightmares about the trauma.
Schizophrenia & Psychotic Disorders: Insomnia during periods of psychosis. Sleep apnea that is secondary to certain medications used to treat the disorder.
Seasonal Affective Disorder: Insomnia or hypersomnia related to depression during the winter months. Circadian shift during the winter months related to reduced daylight.

Diagnosis  
  Sleep problems that are related to a mental health condition would not exist if the underlying psychiatric disorder was not present. Diagnosis might therefore involve some combination of your primary doctor, a psychiatrist, a psychotherapist, and a certified sleep specialist. Whether an overnight sleep study is necessary will depend on your condition. Keep a sleep diary of changes in your sleep since the onset of your illness.

Treatments
 
Be consistent with treating your underlying mental health problem. Take medications on time and do not skip psychotherapy and support group appointments. Keep your doctor advised of changes in your sleep as they arise. If you or a loved one are able, keep a sleep diary of your sleep habits, especially if they change frequently and your condition is expected to be chronic. Good sleep habits will compliment any treatment plan.

Suggested Downlaods

SleepIssues:
Sane Sleep
SleepCaptions:
Psychological Illness and Sleep