If the patient’s legs turn purple after standing, it is mainly caused by venous reflux limitation and bruising, which is mostly seen in varicose veins of the lower limbs or venous valvular insufficiency of the lower limbs. Therefore, after this situation, you should avoid standing for a long time, and elevate the affected limbs when resting in bed, which is favorable to the venous return and the purple of the legs. Hot compresses can be applied to the legs to promote blood circulation in the veins and reduce the purple color of the legs. At the same time, the application of blood circulation drugs and anticoagulant drugs to avoid the emergence of lower extremity venous thrombosis, if necessary, can be in the field activities, the leg elastic bandage fixed to prevent the emergence of purple legs, and long time bruising caused by venous thrombosis. If this situation affects the patient’s normal life and work, surgery can be considered.