It is normal to wake up after 6 hours of sleep. The best sleep time for normal adults is 6-8 hours per day, and it is normal to sleep for 6 hours per day. The normal adult body has a certain biological clock, such as sleeping late and waking up in the morning, which is a regulatory factor of the normal biological clock. It is one of the normal physiological reactions to wake up after 6 hours of normal sleep the next morning after a late night sleep. However, 6 hours of sleep should ensure that the deep sleep phase exceeds 4 hours and the light sleep phase is less than 2 hours as far as possible, which can relieve fatigue and achieve the role of maintaining normal physiological sleep function. If the phase of deep sleep is less than 4 hours, the phase of light sleep is too long or the quality of sleep is poor, you need to visit the neurology department of the hospital to identify the cause of the disease.