- Hypersomnia may be
caused by another sleep disorder (such as
dysfunction of the autonomic nervous system, or
- 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
obesity may contribute to the
- 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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