Psoriasis vulgaris is a common type of clinical condition that begins as a red papule or maculopapular rash that gradually expands and fuses to form well-defined patches. Psoriasis vulgaris is a chronic skin disease, and the pattern of lesions varies in different patients. In common psoriasis, the lesions are found on the knees, elbows, and head. In a small number of patients, the finger (toe) nails are depressed in a punctate (thimble-like) pattern. Types of common psoriasis: 1. Pitting psoriasis: The lesions are small, like raindrops of varying sizes scattered all over the body. This form is mostly seen in progressive psoriasis that has just occurred recently. 2.Ring-shaped or wheel-shaped psoriasis: after the lesions develop to a certain extent, they begin to fade from the center, and gradually the erythema becomes several rings or wheel-shaped. 3, map-shaped psoriasis: after the lesions develop and expand, they often form an irregular map-like appearance. After many lesions fuse with each other, they will also form a map-like appearance. 4.Retrophic psoriasis: while the lesions fade from the center, the periphery keeps developing and expanding around them. When the edges of many annular lesions fuse with each other, a curved, rounded and irregular gyrate appearance is formed. 5.Disk-shaped or silver coin-shaped psoriasis: the lesions are round in shape and resemble silver coins in size, and the scales are white, thick and closely attached. It looks as if many silver coins are attached to the skin. 6, follicular psoriasis: the lesions appear as scaly papules of follicular nature. Diagnosis often requires a skin pathology examination. 7.Oyster shell psoriasis: the scales on the lesions accumulate in layers very thickly, in a conical shape with a small top and a large bottom, much like an oyster shell is buckled on the skin. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. Mild patients can generally use milder agents. In moderate cases, basic emolliency and Chinese herbal soup treatment can be given first, and if the effect is not satisfactory, then a combination of Chinese herbal medicine and western medicine can be used externally. If the symptoms are more serious, and if the effect of local treatment is not good, systemic treatment can be used according to the type of psoriasis, mainly including herbal baths, immunosuppressive drugs, 311 narrow-spectrum UVB phototherapy and so on. Topical glucocorticoids can be used for anti-epidermal hyperplasia, immunosuppression, vasoconstriction, anti-inflammation and anti-itching. For difficult to treat areas, such as the lower extremities and hypertrophic lesions, high potency or super potency hormones can be used to seal the treatment; while for the face and thinner skin areas, the topical use of medium and strong potency hormones is not recommended, only weak or weakest potency preparations can be used. Some patients like to keep using drugs effectively without any review or repeated use, which is also not right. Long-term use can lead to the accumulation of toxic side effects of hormones, such as local skin capillary dilation, skin atrophy or darkening, secondary fungal infections, acne and folliculitis. If used in large areas or in large quantities for a long time, it can also cause systemic adverse reactions.