Catheter-associated infections are mainly seen in patients with deep venous catheters that are placed in the internal jugular or subclavian veins, and if left in place for more than two weeks, they can easily become infected and even septic. Patients may present with fever, intermittent fever, chills, or even a temperature of 39°C or higher, and elevated blood count on laboratory tests. In the process of catheter removal, attention should also be paid to the application of back aspiration methods to try to back aspirate the purulent tissues surrounding the catheter, and local pressure dressing should be applied after catheter removal to avoid the formation of hematoma. In the postoperative period, anti-infection treatment should be continued, and Chinese herbal medicine can also be given to improve microcirculation.