Postherpetic neuralgia (PHN) is a common neuropathic pain syndrome in which chronic pain is often accompanied by severe sleep disturbances that affect patients’ quality of life. At present, the evaluation of sleep disorders in patients with PHN mainly relies on patients’ self-report and monitoring of related devices, and there is still a lack of unified standards. This paper systematically evaluates the current sleep disorder assessment tools used in PHN patients from the aspects of assessment content, application advantages, limitations and characteristics of PHN patients, aiming to reveal their application characteristics and research status in PHN patients, help optimize clinical management strategies for PHN patients, and provide a basis for improving existing tools or developing new tools. This will drive technological innovation and progress in the assessment of sleep disorders.