A diabetic’s blood pressure of 190mmHg, which generally refers to a high pressure (systolic) of 190mmHg, is dangerous and prone to serious complications such as cardiovascular and cerebrovascular accidents, renal failure, and fundus lesions, and even life-threatening. When the high pressure (systolic) of the blood pressure is ≥180mmHg or the low pressure (diastolic) is ≥110mmHg, it is classified as grade 3 hypertension (severe). The diabetic patient’s blood pressure of 190 mmHg is classified as Grade 3 hypertension, which is very dangerous. It can easily cause acute cardiovascular and cerebrovascular events, such as acute myocardial infarction, cerebral hemorrhage, heart failure, etc. It may also cause renal failure and fundopathy, and in more serious cases, death. It is recommended that patients seek timely medical attention to identify the causes of hypertension, and follow the doctor’s instructions to control blood pressure and regulate blood glucose.