Patients who wake up suddenly in the middle of the night and have trouble falling asleep have insomnia, because patients who have trouble waking up and falling back to sleep may experience a decrease in sleep quality and a feeling of fatigue and sleepiness the next day. If the patient has this condition for a long time, it can affect the patient’s ability to work and study. Generally speaking, if patients have insomnia, in addition to difficulty in falling asleep, they may also have difficulty in waking up easily, waking up early and falling back to sleep. Patients may have some physical diseases, such as headache, back pain or restless leg syndrome or sleep apnea syndrome, which may cause patients to wake up suddenly in the middle of the night and have difficulty in falling back to sleep. If this condition occurs for a long time, we recommend that the patient should go to the hospital for consultation.