Psoriasis is classified according to its clinical manifestations into: common, erythrodermic, pustular and arthritic psoriasis; clinically, common psoriasis is more common and its incidence accounts for 95% of the incidence of psoriasis; the rash can be generalized to the whole body and is mainly characterized by large inflammatory erythema, papules and macules, which can rapidly evolve into coin-sized or larger infiltrated plaques, covered with multiple layers of silvery white scales, and the film is visible when the scales are removed. The rash can be divided into drip-like, map-like, coin-like, and ring-like, and the nails and scalp can be involved, with varying degrees of itching. We often divide it into progressive, quiescent, and receding phases; according to Chinese medicine, it can be broadly divided into blood-heat, blood-dry, and blood-stasis, and can be distinguished by dampness and toxicity. Blood-heat evidence: manifesting as bright red lesions, new rash constantly appearing, scales cannot cover the red spots, scraping away the scales can be seen film phenomenon and dotted bleeding, with isomorphic reaction, accompanied by itching, heart trouble, thirst, dry stool, yellow urine, red tongue, yellow coating, smooth pulse. Treatment is mostly based on clearing heat and cooling the blood to detoxify the toxin, and the formula is based on the addition and subtraction of Cool Blood Detoxification Soup, using Comfrey, Cyperus, Dan Pi, Red Peony, Cao He Che, Bai Xian Pi, etc. Blood dryness evidence: manifesting as light-colored lesions, partially fading, more scales, can cover the red spots, dry mouth, light tongue, less moss, thin and slow pulse. Treatment is mostly based on nourishing the blood and moistening the dryness. The formula is based on nourishing the blood and detoxifying the toxin with the addition and subtraction of Shengdi, Angelica, Dan Shen, Yuan Shen, Tu Fu Ling, Cao He Che, etc. Blood stasis evidence: manifested as hypertrophy and infiltration of skin lesions, dark red color, does not subside after a long time, the tongue light dark or purple or petechiae, treatment is mostly to activate blood circulation and disperse blood stasis, the formula to activate blood circulation and disperse stasis Tang plus or minus, the medicine with peach kernel, Dan Shen, chicken blood vine, Curcuma longa, ghost arrow feather, etc., the folder of poison mostly manifested as pharyngeal red, sore throat, add more northern bean root, orris, the folder of wet mostly manifested as erythema covered with sticky scales, not easy to peel off, can add poria, zedoary, white flower snake Tongue grass, etc. Chinese patent medicine: blood-heat evidence mostly with compound Qing Dai capsule, Bai Shu Xia Ta Ge tablets to clear heat and cool blood detoxification; blood-dry evidence mostly with Yin elimination capsule, Bitter Dan Wan to nourish blood and dispel wind and moisten dryness; blood-stasis evidence mostly with Blood Mansions and Stasis capsule, Rhubarb Stinging Worm Pill to activate blood and remove blood stasis. Topical medications: blood heat evidence (equivalent to the progressive phase) prohibit irritating drugs, mostly soothing, protective agents, such as boric acid ointment, borazine paste, Pulian cream, licorice oil, etc.; blood stasis evidence and blood dryness evidence (equivalent to the stationary and receding phases) to remove scales, anti-inflammatory detoxification, can be used 5% – 10% salicylic acid ointment, Puyu cream, bitter ginseng cream. Commercially available tacalcitol (Mengfu) ointment, carbotriol ointment, and skin care ointment are all vitamin D3 derivatives, which can regulate the value-added differentiation of keratin-forming cells and regulate the release of cytokines and inhibit the production of pro-inflammatory factors, so as to suppress inflammation and immune response. Non-drug therapy: Chinese medicine acupuncture, bloodletting and cupping also have unique efficacy in blood stasis and blood dryness (equivalent to the quiescent and receding phases).