If a patient is currently experiencing swollen feet, first ask the patient if he or she has taken any special medications recently. Second, ask the patient if there is any past medical history. In patients with previous diabetes and hypertension, it is important to check BNP and cardiac ultrasound when foot swelling occurs. Because there is a possibility that the swelling of the feet is due to heart failure, liver function, kidney function, and blood sugar should be checked. People with renal insufficiency, cirrhosis, and abnormal liver function can have swollen feet as a condition. Oral administration of specific medications, such as patients who are currently taking licorice-based medications, or glucocorticoids, may also cause swollen feet. In other patients, the swollen feet may be triggered by problems such as hypoalbuminemia or nephrotic syndrome. It is also necessary to distinguish whether the foot is swollen unilaterally or bilaterally so that more targeted diagnosis and treatment can be made.