The main pathogenesis of UC is spleen-asthenia with excessive damp.Therapeutical principle emphasize invigorate the spleen, warm the middle warmer, clearing away the heat-evil and excessive damp.

• 结论：通过用药频数分析可知，本病以脾虚、湿盛为主要病机，治疗看重健脾温中、清热燥湿。