There are more high risk factors for thrombosis. The first aspect is seen in damaged vascular endothelium, such as hypertension, which increases the shear rate of blood vessels and can cause damage to vascular endothelial cells, and exposure of collagen fibers in the endothelium can cause acute thrombosis. The second aspect may be hyperlipidemia, excessive intake of high cholesterol food and increased blood viscosity, which will also tend to form thrombus. There are also some diseases that form thrombus: diabetes, high uric acid can also aggravate and intensify the formation of thrombus. Some stress conditions of the body, dehydration, and blood concentration can trigger the formation of blood clots.