Primary Hypersomnia is a disorder with symptoms of excessive need for sleep. These are manifested as lengthy sleep sessions and/or almost daily sleep during the daytime. It is not based on any underlying pathology or other sleep disorder.

PRIMARY HYPERSOMNIA: "Pablo's life began to be several affected by his primary hypersomnia."
Cite this page: N., Pam M.S., "PRIMARY HYPERSOMNIA," in, April 28, 2013, (accessed July 27, 2021).