Sleep-wake disorders refer to sleep rhythm problems associated with mental and emotional health. These disorders are usually linked to psychological factors, emotional states such as stress, anxiety, and depression, or life events. Some sleep-wake disorders include:

Insomnia Disorder: Emotional factors such as psychological stress, worry, or depression can cause insomnia. The person may have difficulty falling asleep, staying asleep, waking during the night, or waking too early.
Hypersomnia Disorder: Emotional distress, depression, or psychosocial stress may be associated with excessive sleepiness.
Narcolepsy: Characterised by cataplexy (sudden loss of muscle tone), hallucinations, and abnormal daytime sleepiness. Emotional stress can trigger narcoleptic symptoms.
Parasomnia Disorders: Night terrors, sleepwalking, and other parasomnias may be linked to stress, anxiety, or emotional disorders.
Circadian Rhythm Disorders: Psychological stress, depression, or anxiety can affect the biological clock's normal sleep-wake cycle. Associated with factors such as night work and social jet lag.
REM Sleep Behaviour Disorder (RBD): A condition that can be triggered by emotional stress and psychological factors. During REM sleep, when muscles are normally paralysed, the person may move physically.
Sleep Phase Disorder: Emotional states, stress, or psychological problems such as post-traumatic stress disorder (PTSD) may be associated with sleep phase disorder.

Treatment for these disorders is usually guided by a health professional, especially a psychiatrist/clinical psychologist or sleep specialist. Treatment options may include psychotherapy, medication, stress management techniques, and lifestyle changes. In these disorders, it is also important to address underlying psychological problems.