If you wake up at 4 o’clock every morning, it is for the following reasons: 1. The most common reason is plant nerve dysfunction, because of anxiety or relatively poor mental state or poor quality of sleep, so you will wake up at 4 o’clock every morning. If the shallow sleep phase is too long and the deep sleep phase is too short, the plant nerve function should be adjusted to avoid the disorder. 2. Inadequate blood supply to the heart will also cause waking up in sleep at 4:00 every morning because of transient ischemia and spasm in the coronary arteries of the heart. 3. Patients with a previous history of diabetes, such as when a transient hypoglycemic reaction occurs at 3-4:00 a.m., will If you have a history of diabetes, you may wake up in the morning if you have a transient hypoglycemic reaction at 3-4 am.