Cold refers to the acute viral upper respiratory tract infection, influenza caused by influenza virus from other viruses (up to more than 100 species, most common to rhinovirus, coronavirus) is caused by the common cold. Clinical manifestations to nasal congestion, cough, headache, chills, fever, general malaise characterized. Throughout the disease, especially in the spring. Due to the different sense of evil, physical strength, syndrome of upper respiratory tract infection of TCM external medicine category. Various reasons leading to decreased systemic or local defense function of respiratory, cold, rain, climate change, excessive fatigue, which will enable the already exist in the upper respiratory tract or from outside intrusion by viruses or bacteria multiply rapidly, so as to induce the disease. According to the different causes and extent of disease, symptoms can have different types.