Patients with chronic liver disease (CLD) present with various symptoms such as general malaise, hepatic encephalopathy (HE), sarcopenia, and pruritus. In addition, a significant proportion of CLD patients exhibit sleep-wake disturbances such as insomnia, delayed sleep habits, and excessive daytime sleepiness. 1,2 However, sleep-wake disturbances in CLD are not well recognized even by hepatologists, and therapeutic interventions may be inadequate or inappropriate sleep medication may be prescribed. In order to improve the quality of sleep in patients with CLD, an appropriate approach based on an accurate interview is essential.Miyaaki et al. recently reported the prevalence of sleep-wake disturbance in 271 CLD patients (median age: 70 years) and revealed the association between CLD-related complications and sleep disorder. 3 In their cohort, 50.2% of patients had sleep disorders, which was much higher than the general Japanese population. 4 Importantly, they revealed that CLD-related complications, including muscle cramps, covert HE, and dynapenia, were significantly associated with sleep disorders. It is well known that patients with liver cirrhosis are prone to muscle cramps, which can cause sleep disturbances and lower quality of life. [5][6][7] In addition, the evidence-based clinical practice guidelines for liver cirrhosis 2020 states that covert HE, which is a risk factor for progression to overt HE, can cause sleep rhythm disturbances. [6][7][8] It should be noted that the administration of benzodiazepines to patients with covert HE carries the risk of contributing to worsening of the disease to overt HE. 9Dynapenia and pruritus associated with CLD should also be noted as causes of sleep-wake disturbances. Several reports have revealed the close association between CLD-induced sarcopenia and sleep disorder. 10,11 Exercise therapy has the potential to improve sleep quality and quality of life in patients with CLD. 12 Regarding pruritus, Hiraoka et al. recently reported that intervention against pruritus is recommended in CLD patients with an elevated Kawashima's pruritus score (≥2), especially with a high FIB-4 index. 13 In order to optimize the treatment of sleep-wake disturbances in patients with CLD, it is essential to conduct multicenter collaborative studies and develop treatment guidelines led by relevant academic societies. In addition to preparing a high-quality questionnaire for proper evaluation of sleep-wake disturbance, the hepatologist must also pay attention to the patient's comorbidities such as muscle cramps, covert HE, sarcopenia, pruritus, and nocturia, and provide appropriate treatment. In the near future, technology devices such as smartphone apps and wearable devices such as Fitbit will help not only in the diagnosis of complications in patients with CLD, but also monitoring and optimization of exercise and nutrition therapy. 12