Soreness and discomfort in the left arm and leg of patients, the common clinical reasons are mainly as follows: First, patients with right-sided cerebral infarction can cause hemiplegia of the left limb, accompanied by local sensory abnormalities, due to neurological damage, patients will experience soreness and discomfort in the left arm and leg. At this time, patients can be given rehabilitation exercises to strengthen the left side of the limbs to avoid local muscle atrophy and thrombosis, which will aggravate the symptoms of soreness and discomfort. Secondly, when the left limb is accompanied by deep vein thrombosis, the venous blood return of the left arm and left leg can be blocked, and a large amount of blood is stagnated in the peripheral superficial vein, which can cause localized soreness and swelling discomfort. Patients need subcutaneous injection of low molecular heparin, oral activation of blood stasis pills, intravenous application of vincristine and other drugs to improve circulation, which can promote the absorption of thrombus and reduce the symptoms of soreness and swelling of the left arm and leg.