Historical evolution of premenstrual period

1. The Complete Prescription for Regulating Menstruation for Women in Song Dynasty points out that the pathogenesis of this disease is due to "premature onset of yang".

2. The book Puji Shu Fang and Gynecological Diseases further pointed out that "Yang multiplied by Yin leads to blood overflow ... so it was more than a month ago", and later the doctor thought that "the early stage was hot".

3. The book "Women's Principles of Jingyue Quanshu" puts forward that qi deficiency is also an important pathogenesis leading to early stage.