Psoriasis is one of the common incurable diseases in dermatology and belongs to the category of “persistent psoriasis”. The cause of psoriasis is not yet completely clear, and it is speculated that it may be related to genetics, immune dysfunction, metabolic disorders, psychological trauma, damp living environment, trauma and infection, and stimulation by certain foods or drugs. The onset of the disease is often related to the season, there is a summer increase, autumn and winter self-healing; there are also winter and spring recurrence, into the summer to reduce the case. There are more males than females. The clinical features of the disease are papules of varying sizes, erythema, surrounded by an inflammatory red halo, with obvious basal infiltration, covered with multiple layers of dry silvery-white scales, with clear borders, occurring symmetrically on the elbows, knees and head or any part of the body. Western medicine believes that due to excessive proliferation of keratinocytes, various biochemical metabolic disorders lead to aging epidermal cells have not been shed, new epidermal cells emerge again, so incomplete differentiation of epidermal cells rapidly accumulate, starting as corn grain size red spots, soon the surface will appear silvery white scales, gently scraped, can be peeled off, with the expansion of damaged cells lesions can be expanded to the surrounding, and its mutual integration, and finally gradually With the expansion of damaged cells, the lesions can expand to the surrounding area, fuse with each other, and finally gradually form patches of different sizes. According to the above clinical manifestations, especially the characteristics of the rash and histopathological features are generally not difficult to confirm the diagnosis. It should be distinguished from seborrheic dermatitis; pityriasis rosea; lichen planus; red furunculosis; and parapsoriasis. Psoriasis is equivalent to “psoriasis” in Chinese medicine; “white H”; “Bailiff’s wind”; “pineal psoriasis”. There are detailed discussions in successive generations of medical texts, such as the “Treatise on the Origin of Diseases”, which says: “Dry ringworm but with medical Guo, skin withered and itchy, scratching the flakes out is also.” The Complete Book of Surgical Evidence says: “White H (a H wind), dry and itchy skin, starting like a rash scabies and white, scratching the flakes up, gradually to the limbs dry and split, blood out pain.” “Medical Zong Jin Jian” also said: “ringworm sores, the name of which has a long time, a dry ringworm, scratching the itch that is up white flakes, solitary withered …… five said pine bark ringworm, like the skin of the pine, red and white spots accounted for connected, time to time for itching.” And so on. The Chinese medicine believes that this disease is mostly due to the seven emotions, internal injury, qi stagnation, depression for a long time into fire, resulting in hyperactive heart fire; or because of dietary disorder, over-eating fishy start windy food to the spleen and stomach and loss of harmony, qi is not smooth, depression for a long time into heat, and external exposure to the wind mixed with dry heat of the evil guest in the skin; or because of the wind, heat of the evil results in the body and cause the evil qi agglomeration caused by the loss of smooth qi and blood, the skin is not moistened; or because of the loss of camp blood, the production of wind into dry, and moreover wind and cold Due to the external attack, the deregulation of blood and Ying leads to the blockage of meridians and channels and the stagnation of Qi and blood, which causes the disease. From this point of view, psoriasis is mainly characterized by “blood dryness, blood heat and blood deficiency”. During the operation, the patient is made to breathe deeply naturally and keep the whole body muscles relaxed while sitting on a stool, the doctor wears disposable medical gloves and rubs the back of one side of the patient’s ear up and down repeatedly with moderate strength of the thumb until it is red and hot and the superficial veins are locally swollen, after routine sterilization, the doctor pinches the earlobe with the thumb and index finger of the left hand and pulls the back of the ear downward to flatten it, and the middle finger is held by the earnail boat towards the top of the back of the ear, the right hand holds a sterile small scalpel with the tip of the knife After the incision, wipe the incision repeatedly with a cotton ball dipped in alcohol to make the blood flow out naturally, and disinfect it with iodine and wrap it with a band-aid when it bleeds about 1 ml. The procedure is performed twice a week, alternating between the left and right ears, 10 times a course of treatment. When performing the operation, we must pay attention to the strict aseptic operation to prevent secondary infection; when cutting and treating, we must master the technique well to prevent the improper technique from cutting the auricular cartilage; before cutting and treating, we should make a good explanation to the patient to prevent the dizziness of the needle. Patients are advised to abstain from eating beef, mutton, fish, shrimp, seafood, spicy and other stimulating foods. The Ling Shu? Mouth question chapter: “The ear is the gathering of the clan veins.” The “Health Treasure” contains: “The five viscera and six internal organs, twelve meridians have contact with the ear.” There are 260 acupuncture points on the ear, 200 in front and 60 at the back of the ear. The human ear is like an inverted fetus, and every organ and part of the human body has a corresponding representative point (acupuncture point) on the ear. Bloodletting therapy is one of the traditional treatment methods of Chinese medicine. The vein on the back of the ear is taken from the part of the ear undershirt where the acupuncture points belong to the heart and where the branches of the bile meridian follow, in accordance with the principle of “the heart is the master of the mind” and “all pains and itches and sores belong to the heart”; In accordance with the ancient saying that “the bile is the center of the palace”, local excision and bloodletting here has the functions of calming and relieving heat, dispelling dampness (wind), relieving itching, diarrhea and detoxification, clearing heat and cooling the blood, and removing stasis and generating new blood. This method has satisfactory clinical efficacy and no toxic side effects, and is a good method that is relatively safe and ideal for treating psoriasis, which is easy for patients to accept and worth promoting.