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Hypersomnia Overview

Hypersomnia is characterized by recurrent episodes of excessive daytime sleepiness or prolonged nighttime sleep.

Hypersomnia Causes

  • Hypersomnia may be caused by another sleep disorder (such as narcolepsy or sleep apnea), dysfunction of the autonomic nervous system, or drug or alcohol abuse.
  • In some cases it results from a physical problem, such as a tumor, head trauma, or injury to the central nervous system.
  • Certain medications, or medicine withdrawal, may also cause hypersomnia.
  • Medical conditions including multiple sclerosis, depression, encephalitis, epilepsy, or obesity may contribute to the disorder.
  • Some people appear to have a genetic predisposition to hypersomnia; in others, there is no known cause.
  • Typically, hypersomnia is first recognized in adolescence or young adulthood.

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