The reason of no symptom for distinguishing is the limited description of patient and the physiological deficiency of doctor. The scholar proposes that no symptom for distinguishing is the blind spot of traditional Chinese Medicine syndrome, which must be assisted by ”micro syndrome” of modern medical science. I think the diagnosis method of no symptom for distinguishing existed in ancient time. Except the assist of ”micro syndrome” of modem medical science, the traditional diagnosis method of Chinese Medicine shall be strengthened, such as pulse diagnosis, belly diagnosis, the collateral channels point examination, physique diagnosis, sounds test diagnosis etc., in order to increase the diagnosis ability of doctor.