11. KLS should also be distinguished from very rare cases of menstruation-caused hypersomnia . 12. Further complicating the diagnostic process, idiopathic hypersomnia lacks a clearly defining clinical feature. 13. There are also several genetic disorders that may be associated with primary / central hypersomnia . 14. Autoimmune diseases, especially lupus and rheumatoid arthritis are often associated with hypersomnia , as well. 15. Behaviorally induced insufficient sleep syndrome must also be considered in the differential diagnosis of secondary hypersomnia . 16. There is limited evidence of what role hypocretin may play, although it often influences hypersomnia . 17. The injury caused dizziness, pain, and spells of hypersomnia , which occurred throughout her life. 18. This classification has steadily evolved, as further research has shown overlap between narcolepsy and idiopathic hypersomnia . 19. Hypothyroidism and iron deficiency with or without ( iron-deficiency anemia ) can also cause secondary hypersomnia . 20. Mood disorders, like depression, anxiety disorder and bipolar disorder, can also be associated with hypersomnia .
