It is now a common folk saying to ask the doctor at the time of consultation, “Is my blood thick? Many patients in outpatient clinics request blood tests and specifically ask the doctor to check their “blood is thick or not? In fact, in the field of medical science, and especially in the field of medical science, it is very important to check whether the blood is thick. In fact, in the field of medical science, especially in the field of clinical medicine, there is no such concept as “thick blood”, but only in the case of severe dehydration, the blood may become thick, that is, due to a large loss of water, the water in the blood decreases, so that the number of organic components such as blood cells per unit volume increases, which may cause metabolic disorders. In fact, cerebral infarction is a vascular disease. In fact, cerebral infarction is a vascular disease, not a blood disease! There is no necessary connection between the viscosity of blood and cerebral infarction. Of course, on the basis of vascular disease, if the blood becomes viscous, it is possible to induce infarction. Like myocardial infarction, cerebral infarction is based on vascular lesions, and the main pathological changes are “atherosclerosis” and “atherosclerotic plaques on the walls of blood vessels after atherosclerosis”. Due to the instability of this atherosclerotic plaque, it is easy to rupture at the base, narrowing the blood vessels, and on this basis blood rheology changes, forming a thrombus, which is called “infarction” due to the ischemic necrosis of the tissue. If it occurs in the heart, it is called myocardial infarction, and if it occurs in the brain, it is called “cerebral infarction”. Therefore, the term “thick blood” is not scientific. Of course, abnormal lipid metabolism is an important risk factor for atherosclerosis, so it is necessary to frequently observe whether there is abnormal lipid metabolism. Another thing is that patients often ask their doctors whether they should “flush the blood vessels” frequently after suffering from cerebral infarction. I think this is also a misunderstanding. At present, the treatment drugs are mainly vasodilators and anti-platelet coagulation drugs. The disease should be treated in a timely manner, and the usual active treatment of certain underlying diseases, such as diabetes, hypertension, mental anxiety, etc., and the abandonment of certain risk factors, such as smoking, can effectively prevent the occurrence of certain vascular diseases. There is also the question that patients’ families, especially those from rural areas, often ask: Can infusions “thin” the blood vessels? I say it will not. Normal treatment is mainly to dilate blood vessels to increase local blood flow and improve local circulation; anticoagulants are to affect the blood coagulation process, reduce thrombosis and avoid the expansion of infarct area. As long as the rational use of drugs is beneficial to treatment.