Sleep dysfunction

Sleep dysfunction is universal in ME/CFS patients, although it can take a very wide range of forms. These include dysania, hypersomnia, hypnagogia, insomnia, light sleep, myoclonus, nightmares, night sweats, phase shifting, somnolence, and unrefreshing sleep.

Symptom recgonition

 * In the Holmes criteria, sleep disturbance is an optional criteria for diagnosis, under the section Minor Symptom Criteria.