Primary low pressure (15-25mmHg): suitable for long-term bed rest, health care prevention for people with high incidence of thrombosis;

Primary pressure (20-30mmHg): people with potential venous disease, prevent it from happening, feeling heavy and fatigue in the legs, mild varicose veins during pregnancy, mild varicose veins, etc.

Secondary pressure (30-40mmHg): more severe varicose veins during pregnancy, varicose veins with mild edema, thrombotic superficial phlebitis and deep phlebitis, successful treatment after sclerotherapy or after surgery, chronic veins Valve insufficiency disease, erect/post position hypotension, deep vein thrombosis after basic treatment, prevention or treatment of post-thrombotic syndrome;

Tertiary pressure (40-50mmHg): severe varicose veins with obvious edema in the legs, severe venous insufficiency, severe ulcer erosion, post-traumatic edema, reversible lymphedema