Symptoms of venous disease of the lower extremities (chronic venous insufficiency such as superficial varicose veins, deep venous reflux, and deep vein thrombosis of the lower extremities) can be relieved by bed rest and elevation of the affected limb. However, prolonged bed rest is both impractical and dangerous for most patients. Non-surgical treatment remains the standard initial treatment for this type of disease as opposed to surgical treatment. The goal of non-surgical treatment is to restore daily activity, improve venous function, reduce signs and symptoms such as leg pain and edema, and reduce bed rest. Among the conservative treatments, compression therapy (including the wearing of compression stockings and the use of elastic bandages) is considered to be the basic treatment for all kinds of venous insufficiency of the lower extremities, including venous ulcers. Medication is an adjunct to compression therapy and is less often used alone in the treatment of patients with chronic venous insufficiency. Compression therapy can improve sensations such as leg pain, suffocation and heaviness, prevent or improve swelling of the lower extremity, promote ulcer healing, and potentially prevent recurrence of the ulcer after it has healed. Compared to compression stockings, using medical elastic bandages to wrap the affected limb in a sequential manner can also provide gradient compression therapy. However, for ordinary people, the tightness of the bandage (i.e., the force of compression) is not easy to grasp, and too tight compression can lead to ischemia in the limb due to arterial compression, and may also cause the symptoms to worsen due to the reversal of the pressure gradient (high pressure at the upper end and low pressure at the lower end) when wrapping. At the same time, the bandage can easily loosen on its own, leading to compression failure. It is now advocated to wear medical compression stockings, which are both reliable and easy to use. In view of the fact that the genetic factors cannot be eliminated with surgery, medication and other treatments, but exist for life with the patients, it is recommended that the patients should wear compression stockings for a long time (with or without surgery, medication, etc.) if there is no contraindication (heart failure, lower limb artery occlusion, acute infection of lower limb soft tissue, etc.). It is recommended that patients wear compression stockings for a long time (with or without surgery, medication, etc.) or even for the rest of their lives to control symptoms and reduce complications. Before wearing an elastic stocking, it is necessary to measure the size of the specific part of the lower extremity and choose the right size and compression of the stocking. During the wearing process, if they are not broken, they need to be replaced every six months to maintain the right pressure for the best therapeutic effect; if they are broken, immediate replacement is recommended. For patients with lower limb deep vein thrombosis, wearing elastic stockings when getting out of bed after the acute period can effectively control the discomfort of lower limb suffocation, acidity, heaviness and pain, and at the same time can reduce the incidence of post-deep vein thrombosis syndrome, prevent or reduce the occurrence of ulcers and reduce the disability rate.