If patients appear to dream a lot once they sleep: 1, due to plant nerve dysfunction, insomnia, excessive dreaming and easy dreaming in sleep will occur when peripheral neuritis or previous history of diabetes mellitus, plant nerve dysfunction or obvious peripheral neuritis occur; 2, in patients with previous history of cerebrovascular insufficiency of blood supply, for example, after stroke, After cerebrovascular accident, cerebral infarction, cerebral hemorrhage sequelae, cerebral embolism and other diseases, if there is a transient cerebrovascular blood supply deficiency during sleep, for example, when TIA attacks, they will also appear easy to dream during sleep; 3. Sleep apnea syndrome, these patients are chronic pulmonary insufficiency, pulmonary hypertension, and will also appear easy to dream during sleep with clinical symptoms.