Based on the theory of ascending and descending of center

qi

， it is believed that

yang

deficiency and water dampness， as well as abnormal circulation of center

qi

， are the core pathogenesis of psoriasis. The common pathogenic evolution of psoriasis includes wood constraint and blood stagnation， lung metal fluid exhaustion. In the later stage of psoriasis， a mixture of deficiency and excess patterns， as well as cold and heat in complexity， are often observed. Treatment focuses on warming

yang

and resolving dampness to restore proper

qi

ascending and descending， and the therapeutic formulas such as

Ganjiang Lingzhu Decoction

（甘姜苓术汤），

Zexie Decoction

（泽泻汤），

Zhenwu Decoction

（真武汤）， and

Linggui Zhugan Decoction

（苓桂术甘汤） are suggested based on the nature and location of the disease. To unblock the

qi

movement through discharging the liver and rectifying the lung，

Xiaochaihu Decoction

（小柴胡汤） and

Danzhi Xiaoyao Powder

（丹栀逍遥散） are commonly used as the foundation with modifications. To balance

yin

and

yang

through clearing the heart and nourishing the kidneys， a self-designed

Changzhong Decoction

（畅中汤） is utilized. Following the theory of ascending and descending of center

qi

， it is suggested to combine cold and warm medicinals and mediate the center earth， so as to promote the circulation of the center

qi

， restore the clear and the turbid， and keep four-dimensional smooth flow of

qi

， providing a reference for traditional Chinese medicine treatment for psoriasis.