Z91.3: Personal history of unhealthy sleep-wake schedule

A personal history of an unhealthy sleep-wake schedule refers to a patient's past pattern of sleeping and waking that has been irregular or inconsistent. This can mean that the patient has not been getting enough sleep, has been sleeping at strange or unconventional hours, or has frequently been switching between day and night shifts. This pattern can disrupt the body's natural circadian rhythm, which is the internal clock that regulates our sleep-wake cycle. Lack of adequate sleep or having an irregular sleep pattern can cause numerous physical and mental health challenges. These may include daytime fatigue, difficulty concentrating, mood changes, and in some severe cases, it can increase the risk of serious medical conditions such as diabetes, heart disease, and obesity. The body might also struggle to accomplish important physiological functions that occur during sleep, such as tissue repair and memory consolidation.