蛇杖, or the "Caduceus," is a symbol often associated with medicine and healing. It features two snakes winding around a winged staff. Historically, it has been linked to Hermes, the Greek god of commerce and communication, but it is frequently confused with the Rod of Asclepius, which has only one snake and no wings, representing medicine more accurately. The Caduceus is commonly used in the logos of medical organizations and institutions, despite its original association with trade and negotiation. Its widespread use in healthcare symbolizes balance and harmony, reflecting the dual nature of health and illness in medical practice.