At present, the common chronic diseases are as follows: rheumatology: psoriasis; neurology mainly includes cerebral hemorrhage, sequelae of cerebral infarction, aphasia, mobility disorders, etc., in addition to Parkinson’s and epilepsy; endocrinology mainly includes heart, brain, kidney and eye complications caused by diabetes and heart insufficiency caused by hyperthyroidism; respiratory medicine mainly includes pulmonary heart disease, especially pulmonary heart disease in its decompensated stage; cardiovascular medicine mainly refers to hypertension combined with heart, brain, kidney and eye complications; gastroenterology mainly refers to chronic hepatitis in its active stage. The cardiovascular department mainly refers to hypertension combined with heart, brain, kidney and eye complications; the gastroenterology department mainly refers to the active stage of chronic hepatitis. From the above chronic diseases, we can see that the primary lesions alone are often not classified as chronic diseases, but only when there are complications such as heart, brain, kidney and eye, they belong to the category of chronic diseases, because the harm brought by these complications often exceeds the harm brought by the primary disease, such as hypertension patients, the simple increase and decrease of blood pressure, doctors only need to adjust with drugs, but if the patient appears If a patient has complications, it is very difficult to deal with them, heart complications, such as heart failure and heart attack; cranial complications, such as cerebral infarction and cerebral hemorrhage; eye complications, such as optic papilledema and even blindness; and kidney complications, such as renal infarction, all of which are far more dangerous than the harm caused by ordinary hypertension fluctuations.