In the Qing Dynasty， WU Cheng， a physician from Xin'an School， described in Collected Writings of Buju that wind depression syndrome and wind consumption syndrome both belong to the category of external damage. In clinical practice， their pulse patterns， syndrome manifestations， and treatment are easily confused， necessitating a thorough examination of the pathomechanism， with the principles of "resolving constraint" and "tonifying constraint" as the guiding framework.Although both fall under external damage， their etiology and pathogenesis differ， with distinct treatment methods， prescriptions， and pulse characteristics. WU Cheng broke through previous limitations in treating damage and established the theory of "external damage causing deficiency"， laying the academic foundation for later differentiation and treatment of external deficiency diseases. Clinical practice should adopt individualized treatment plans based on specific disease features. Meanwhile， careful observation of pulse changes is of great significance for improving diagnostic accuracy and treatment specificity.