Belly shots against blood clots usually have to be given for about 7 to 10 days, but the exact time will depend on the patient’s specific situation. Belly needle anti-thrombosis is mainly injected under the belly with low molecular heparin. Low molecular heparin has an antithrombin binding effect, so that the configuration of thrombin changes, the exposure of the active ingredient and coagulation factors combined to inhibit coagulation factors, generally used for postoperative fracture thrombosis prophylactic therapy Belly shot anti-thrombosis playing a few days, need to be based on the severity of the patient’s condition, the length of the disease and dynamic monitoring of coagulation function indicators to comprehensively determine the general situation of belly shot anti-thrombosis need to play about 7 to 10 days. If the coagulation function is abnormal, there is a tendency to bleed, you need to stop the application of low molecular heparin in a timely manner, so as not to lead to the possibility of bleeding. Patients who need to use belly acupuncture to prevent blood clots should be under the guidance of a doctor to avoid adverse consequences.