Objective To study the characteristics of TCM syndrome kidney-Yin deficiency of IgA Nephropathy.Methods Information of the related diagnosis TCM of IgA nephropathy patients were collected and discriminated with the standards of related TCM syndromes.SPSS13.0 was used to perform frequency and factor analysis.Results Characteristics of TCM syndrome kidney-Yin deficiency of IgA nephropathy were:(1)Symptom of impaired kidney function: waist and back pain,feeling of weak leg and knee,fatigue and lack of strength...