Dizziness in diabetes mellitus with cerebral infarction may be caused by insufficient cerebral blood supply, recurrent cerebral infarction, hypoglycemia and so on. 1. Insufficient cerebral blood supply: diabetes mellitus combined with cerebral infarction with the symptom of dizziness, consider the possibility of insufficient cerebral blood supply. 2. Recurrent cerebral infarction: diabetes mellitus patients with previous cerebral infarction are prone to recurrent cerebral infarction. If the patient has dizziness with nausea and vomiting, accompanied by impaired limb movement, it is necessary to exclude the recurrence of cerebral infarction. 3. Hypoglycemia: Low blood sugar leads to insufficient supply of energy to the brain, which can also lead to dizziness, and the situation can be clarified by monitoring blood sugar in time. It is recommended that the patient should consult the doctor for examination and treatment under the doctor’s guidance.