Contraindications to compression therapy of the lower extremities are as follows: 1. If there are clear wounds in the lower extremities, especially sutured wounds or wounds after surgery, if pressure therapy is used, it will easily lead to reopening of the wounds and result in the possibility of bleeding. 2. Patients with poor coagulation function, such as patients with congenital lack of platelets and coagulation factors and those taking anticoagulant drugs for a long time, if pressure therapy is powerful, it may 3. For patients who have clearly lower limb thrombosis or thrombus blockage, if pressure therapy is used, it is likely to lead to thrombus dislodgement, and the thrombus can then invade the whole body through blood circulation, leading to serious sequelae such as cerebral infarction, pulmonary embolism or myocardial infarction.