If a diabetic patient has symptoms of numbness in the fingers, it often suggests the following diseases: 1, the most likely is diabetic peripheral neuropathy, which is the first to be considered, because if a diabetic patient has peripheral neuropathy, the whole symptom is characterized by symmetrical numbness in the hands and feet, and in some cases even pain, it must be remembered that this performance is often symmetrical episodes, starting from the feet first. 2. Diabetic patients with cerebrovascular disease, especially ischemic stroke, because ischemic stroke affects the central nerve and then involves the peripheral nerves, which can also cause numbness in the fingers. Diabetic patients themselves belong to the high-risk group of cerebrovascular disease, so from the diagnosis, considering these two diseases after the corresponding examination, in order to target the diagnosis.