Xiang thinking exists in various fields of TCM theories and clinical application,which is the core thinking method of TCM.Dermatology of TCM is a clinical discipline characterized by skin lesion morphology.Image analogy is widely used in the diagnosis and treatment of dermatosis.In his clinical practice,professor OUYANG Heng used Xiang thinking and image analogy flexibly,introduced the theory of pharmacology,and creatively proposed the five intuitive therapies: method of treating dermatosis with ‘color for color,skin to skin,shape for shape,fi...