Objective: To obtain the characteristics of the infrared chart of the normal male yang deficiency constitution in different ages and seasons. Methods: The normal male yang deficiency constitution crowd without disease were screened at traditional Chinese medicine hospital examination department, preventive treatment of disease center or out-patient; and the infrared chart, the differential data of zang-fu viscera, channel, point were obtained to analyze and summarize the characteristics of the infrared chart of the normal male yang deficiency c...