Diabetic patients may suffer from insomnia. There are many factors that affect sleep, including the nerves of the brain, including the autonomic nerves of the body, cerebrovascular, etc. Diabetic patients are much more likely to have problems with nerves and blood vessels compared to the general population. Because cerebrovascular lesions are one of the characteristic macrovascular lesions in diabetic patients, the incidence is very high, and the occurrence of cerebrovascular lesions will produce corresponding disorders in the metabolism and oxygen supply of the brain. If the metabolic disorder is significant or if the brain is significantly hypoxic, it has a great impact on the formation of sleep and can lead to insomnia. If diabetes causes neuropathy, especially autonomic neuropathy, it can also cause insomnia, because many body systems and sleep are directly related to the function of the autonomic nerves, and the whole sleep rhythm will be disturbed when the autonomic nerves are disturbed, leading to insomnia.