Obstinate eczema has complex etiology and pathogenesis.Deficiency of healthy qi is fundamental cause of the disease，while pathogenic dampness which is stagnant in nature and may throughout the course of the disease is main pathogenic factor.The authors put forward that the treatment should emphasize on strengthening the body resistance and take eliminating pathogenic factors into consideration.Strengthening body resistance mainly starts from three aspects including reinforcing lung qi， invigorating spleen and stomach， and transporting and reinforce yang， while eliminating pathogenic factors begins with dispelling stubborn dampness and giving judicious guidance according to circumstances，which has significant clinical effect.