Some information about what causes hypersomnia and who's likely to get it. Well-Connected Causes of Hypersomnia in General Immune Factors. High levels of TNF-alpha are known to cause fatigue, shortness of breath, and a weak heart pumping action.
Hypersomnia can also occur without any identifiable cause.
Specific Causes of Sleep Apnea Physical Characteristics. There is often a family history of apnea, which is probably due to inherited physical characteristics in the face and neck areas that cause breathing abnormalities. Snoring is strongly associated with sleep apnea. Snoring vibrations and the increased pressure against the upper airways as snoring people inhale may over time cause the soft palate to lengthen. Snoring, then, may actually be a cause of the soft palate changes that trigger some cases of sleep apnea, not a consequence of it.