causes of hypersomnia
Causes of Hypersomnia. Hypersomnia has many and varied causes, including sleep apnea, narcolepsy, excess weight, drug or alcohol abuse, brain tumor and certain medications. Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Hypersomnia) that could possibly cause Hypersomnia includes: 1  Sleep deprivation. 2  Clinical depression.  Schizophrenia.
Sleep movement disorders, such as restless legs syndrome (RLS) and periodic limb movement disorder (PLMD or PLMS) can also cause secondary hypersomnia. Although RLS does commonly cause EDS, PLMS does not. There is no evidence that PLMS plays âa role in the etiology of daytime sleepiness.