Generally, simple grade 3 hypertension cannot be designated as a chronic disease. For the diagnostic criteria of chronic disease, in addition to the diagnosis of grade 3 hypertension, there should be comorbidities, including neurological comorbidities, which generally include the combination of cerebral infarction, cerebral hemorrhage, and resulting in the dysfunction of the limbs. There are also comorbidities of the kidney, such as renal insufficiency, creatinine and urea nitrogen that meet the diagnostic criteria of chronic disease, which can be designated as chronic disease. There are also patients with hypertension combined with cardiac diseases, such as combined cardiac insufficiency, generally require cardiac function to reach class III or above, cardiac ultrasound suggests that the left ventricle is enlarged, generally women>50mm, men>55mm, and the ejection fraction is less than 40%, in order to achieve the standard of slow disease. If it is simply grade 3 hypertension, it cannot be designated as a chronic disease.