Venous thromboembolism is a disease with very few warning symptoms, so most patients only discover the disease when it is in the late stages. If not treated promptly, it will cause the risk of pulmonary embolism and lead to death. Venous thromboembolism can happen to anyone, at any age.

Deep vein thrombosis is one of the common cardiovascular diseases. This disease often occurs quite silently, many patients do not know they have the disease.