Common causes of frequent black-eyed dizziness include: 1. If patients often experience dizziness and blackness in front of the eyes, it is because insufficient cerebrovascular blood supply accounts for the main factor. In general, acute cerebrovascular insufficiency of blood supply, cerebral atherosclerosis, cerebrovascular ischemic changes, cerebrovascular stenosis or stroke, cerebral infarction, cerebral embolism cerebral hemorrhage, can cause the above-mentioned situation. 2, if the patient has previous diabetes, if there is hypoglycemia, when the blood sugar is less than 3.9 mmol/L, there will also be frequent dizziness and blackness in front of the eyes. 3, in some cardiogenic Diseases, such as coronary heart disease, myocarditis, hypertrophic obstructive cardiomyopathy, rheumatic heart disease, these conditions can cause ischemia, stenosis, spasm of the coronary arteries. In this case, it can also cause reflex cerebrovascular insufficiency, resulting in the above clinical symptoms and manifestations.