This paper summarized professor AI Rudi's clinical experience in treating primary cutaneous amyloidosis （PCA） from the perspective of "skin accumulation". The morphology and pathological characteristics of PCA are similar to those of accumulation diseases in traditional Chinese medicine， proposing the concept of "skin accumulation". It is believed that the core pathogenesis of PCA is the invasion of pathogenic factors while healthy

qi

is in deficiency， and phlegm and stasis consolidating the exterior， which can be mainly categorized into the type of root deficiency and branch excess. Depleted healthy

qi

and loose striae and interstices are the root， while pathogen lingering in the skin surface， fluids and blood failure to be distributed， and binding of phlegm and stasis are the branch of the disease. The main treatment principle is consolidating the root and clearing the source. For internal treatment， it is recommended to fortify the spleen and nourish kidney， dispel phlegm and dissolve stasis， soften hardness and dissipate masses， with Self-made

Erxian Sishen Decoction

（二仙四参汤）

， Guizhi Fuling Pills

（桂枝茯苓丸），

Huajian Erchen Pills

（化坚二陈丸） and

Modified Xiaolei Pills

（加味消瘰丸）. For external treatment， it is important to dispel pathogens and disperse accumulation， scatter and unblock fluids and blood， and hot baking with self-made

Ruiji Paste

（润肌膏） can be used to promote softening and peeling of skin lesions， and medicinal bath with pig bile to open striae and dispel pathogen， bovine spinal cord sealing to nourish the skin.