Left leg thrombosis is categorized into arterial thrombosis and venous thrombosis, and patients can alleviate the condition through medication and surgery. 1. Left leg venous thrombosis: patients should pay attention to bed rest, do not massage the affected limb, and do a good job of protection of the affected limb to prevent trauma, to avoid causing thrombus dislodgement, inducing serious pulmonary embolism. Venous thrombosis patients can take warfarin, rivaroxaban, urokinase, alteplase and other thrombolytic drugs under the guidance of the doctor for treatment. If necessary, catheter thrombolysis or surgical thrombolysis can be carried out. 2. Left leg arterial thrombosis: if the patient is acute arterial thrombosis caused by left leg thrombosis, the patient should seek medical treatment in time for emergency surgery, which can be carried out to extract the thrombus from the thrombus tube, or lower extremity arterial thrombus suction or placement of thrombolysis and other treatments; if the patient is a chronic arterial thrombosis caused by the left leg thrombosis, the patient can be through the balloon dilatation, plaque rotary cutting, stent implantation and other means of interventional therapy. In addition, patients also need to take antiplatelet drugs, such as aspirin, clopidogrel bisulfate tablets, etc. after surgery. It is recommended that patients strictly follow the doctor’s instructions for medication, actively cooperate with the doctor’s treatment, pay attention to leg care in life, and avoid strenuous exercise or heavy physical labor, so as not to aggravate the condition.