Hyperviscosity, also known as blood hyperviscosity syndrome, is a pathophysiological concept, which is a syndrome caused by one or several elevated blood viscosity factors (such as increased whole blood viscosity, increased erythrocyte aggregation, increased platelet aggregation, increased plasma viscosity, increased plasma fibrinogen, and increased erythrocyte deformation index, i.e., decreased deformability). The main clinical manifestation is a certain degree of abnormal blood rheology index and microcirculatory disorders, reflecting the state of blood concentration, viscosity, coagulation and aggregation. Blood rheology abnormalities and microcirculatory disorders are the common pathological basis of many diseases, and improving their abnormalities has positive effects on the prevention and treatment of their related diseases. Chinese medicine is unique in the treatment of hyperviscosity, as it can improve the blood rheology and microcirculation, resulting in significant improvement of blood concentration, viscosity, coagulation and aggregation, and promote the recovery of the disease. Hyperviscosity is common in middle-aged and elderly people, mostly related to hyperlipidemia, hypertension, atherosclerosis, cardiovascular diseases, peripheral vascular diseases, such as true erythrocytosis, acute pulmonary heart disease, congestive heart failure, congenital heart disease, plateau reaction and altitude sickness, hypertension, atherosclerosis, diabetes, hyperlipidemia, cerebral infarction, myocardial infarction, peripheral vascular diseases, shock, burn injury, lupus erythematosus, etc. burns, lupus erythematosus, etc. Primary hyperviscosity is mostly seen in middle-aged and elderly people, and it is easy to be ignored because there are no obvious symptoms after the onset and at the early stage. Common symptoms include dizziness, headache, palpitations, chest tightness, fatigue, numbness of limbs, and heavy body pain. Many diseases can develop hyperviscosity at a certain period of time, or it may be before the occurrence of the disease, or without any obvious clinical symptoms, or it may be a precursor to the occurrence of certain diseases, so it should be taken seriously and early intervention and prevention. Hyperviscosity is caused by various factors. In Chinese medicine, hyperviscosity is mostly caused by blood stasis, mainly due to the dysfunction of the internal organs, yin and yang, and is related to poor diet, emotional disorders, bruises and injuries, overexertion and chronic diseases. In Chinese medicine, the main treatment is to activate blood circulation and eliminate blood stasis, together with qi circulation, qi tonification, yang warming, cold dispersal, phlegm dissolution, and ligament circulation. It is often classified into blood stasis type, qi-blood-blood stasis type, liver-kidney yin deficiency and liver-yang hyperactivity type, and phlegm-stagnation type, which can be treated with Blood Mansions and Stasis Removal Soup, Tonic Yang Returning Five Soup, Liver Liver Quenching Wind Soup and Warm Gall Bladder Soup with addition and subtraction. In terms of prevention and treatment, the following aspects should be noted: 1. Eat a light diet, more vegetables, fruits and less high-fat food. Eat more mushrooms, black fungus, eggplant, tomatoes, loofah, cucumber, bitter melon, garlic, onion, celery, nori, kelp, seaweed and other foods that help reduce blood viscosity and soften blood vessels. Drink more water, appropriate tea, and a small amount of red wine every day, can improve blood rheology and microcirculation. 2, adhere to physical exercise, such as jogging, walking, tai chi, etc. can make the blood flow faster and reduce the aggregation of red blood cells, etc. 3, maintain a regular life, avoid the influence of adverse factors (smoking, alcohol abuse). 4. Maintain a good mood and avoid stimulation of the seven emotions. 5. Regular physical examination, strengthen the monitoring and control of blood pressure, blood sugar, blood lipids, etc. Introduce several daily health food therapy formulas to prevent hyperviscosity: ① American ginseng, Panax ginseng, red currant, Salvia miltiorrhiza, each drug is finely grinded into equal parts, 5 grams each time, morning and evening with boiled water. ②Hawthorn 10 grams, honeysuckle 5 grams, chrysanthemum 5 grams, gynostemma 5 grams, wash and boil water to drink as tea. Suitable for people with high blood pressure, hypertension, hyperlipidemia and coronary heart disease. (3) 10 grams of Chinese wolfberry, 10 grams of cassia seeds, 15 grams of hawthorn, 10 grams of raw shouwu, 10 grams of salvia, 10 grams of Chuanxiong, decocted and boiled in water for 2 times, and the combined liquid is taken in 2 times. Suitable for hyperviscosity and obese people. ④ 15 grams each of kombu and seaweed, 100 grams of soybean, add appropriate amount of refined salt and sesame oil, boil the soup and take it.