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Different from feeling tired due to lack of or interrupted sleep at night, persons with hypersomnia are compelled to nap repeatedly during the day, often at inappropriate times such as at work, during a meal, or in conversation. These daytime naps usually provide no relief from symptoms. Patients often have difficulty waking from a long sleep, and may feel disoriented.

Other symptoms may include:

• anxiety,
  
  
• increased irritation,
  
  
• decreased energy,
  
  
• restlessness,
  
  
• slow thinking,
  
  
• slow speech,
  
  
• loss of appetite,
  
  
• hallucinations, and
  
  
• memory difficulty.

Some patients lose the ability to function in family, social, occupational, or other settings.

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