Methods of Relieving Exterior-interior Syndrome and Tetrad Therapy in Differentiating and Treating Influenza

The concept of relieving exterior-interior syndrome combined with diaphoretic， harmonizing， clearing and purgative method is put forward for the treatment of influenza， which can be divided into the common syndrome and deteriorated syndrome based on syndrome differentiation. This preliminary scheme provides new thoughts and methods for treating influenza from the perspective of traditional Chinese medicine.