The causes of excessive dreaming in the afternoon are as follows: 1. Normal people usually have difficulty entering the deep sleep phase during the afternoon nap, and basically stay in the light sleep phase, in which insomnia and excessive dreaming occur, and even after falling asleep, they are prone to dreaming. 2. 3. Patients with a history of cerebrovascular disease, such as acute stroke or sequelae of cerebral hemorrhage or cerebral infarction, are prone to abnormal brain wave discharges during naps, so they are prone to dreaming.