Professor XIAO Chengzong′s clinical experience in treating sequelae of pelvic inflammatory disease from the liver was summarized. On the basis of "women′s abdominal pain"

the disease name of "women′s chronic abdominal pain" was proposed

and liver depression was regarded as the main pathogenesis of sequelae of pelvic inflammatory disease. Modified Ercao Erhua Erteng Decoction（二草二花二藤汤） and Danggui Shaoyao Powder（当归芍药散） were used for clinical treatment based on the principal of dispersing the liver and clearing heat

dispersing the stagnated liver-energy and invigorating the spleen

and supplementing kidney and nourishing liver.