The most common sleep characteristic of depression is early awakening. A typical depressed patient may wake up more than two hours earlier than normal, which may be considered to be related to the patient’s increased depressive symptoms in the morning, and the patient often appears reluctant to get up, tired and weak. Depressed patients may also have difficulty falling asleep or wake up frequently, which may be related to the patient’s mental stress or tension, and it is difficult for the patient to fall asleep without relaxing. Depressed patients may also experience excessive sleep, also known as drowsiness, and the patient’s sleep needs may increase, not only sleeping more at night, but also experiencing constant dozing during the day, which may be caused by the patient’s depressive mood or due to physical illness, and should be examined and treated in detail.