There are several situations when you go to bed early at night and still get up sleepy in the morning: First, although you go to bed early, the quality of sleep may not be good. During the whole sleep process, most of them may be light sleep and dreaming period, and lack of deep sleep period, so that you will feel sleepy in the morning too. Because deep sleep is the most important sleep period for our physical strength and energy recovery. Secondly, it depends on whether there is snoring at night, because snoring patients often have sleep apnea at night, which leads to lack of oxygen at night. If there is lack of oxygen at night, you will also feel sleepy during the day and feel that you did not sleep well the night before. Third, there are times when sleeping too long is actually not good. Because human sleep is a cycle, usually first into light sleep, then into a deep sleep, and then into the dreaming period. However, to the back of the deep sleep will be less and less, extended mostly light sleep. At this time, it is easy to be disturbed by the environment and be woken up, sleep is intermittent and unsettled state, and there is no relief after waking up, so you will still feel sleepy.