Psoriasis onset precursor performance 1, psoriasis before the onset of often have self-conscious throat area uncomfortable, often red, swollen, pain, or tonsils often swollen, pain, not easy to subside. 2, women after 40 years old, men after 50 years old, start to enter menopause, with the endocrine changes, the stability of immune function weaken, in the past and can not cause lesions of mild infection, washing goods, food (especially wine), drugs, negative events, etc., at this time will be triggered by the causative factors of psoriasis, if these things happen after the discovery of the scalp or the body of a local itching, scratching after the local have If you find itchy scalp or a part of your body after these things, and there are localized bleeding spots after scratching, you have to pay attention. 3, psoriasis susceptible people’s body’s skin after scratching or injection needle puncture needle eye, etc., long time does not heal, appear as red rash, and red rash above constantly have silver-white scales off, and accompanied by different degree of itching. The precursor of psoriasis has sounded the alarm for people, everyone should pay attention to the details of life, pay attention to according to the weather to add or subtract clothing, especially those who have psoriasis genetic family history of friends, usually have to inhibit psoriasis triggering causes, and actively strengthen the exercise, through a variety of ways to improve their own ability to resist the disease, so it will not be easy to suffer from psoriasis. The clinical manifestations of psoriasis 1, the rash is characterized by inflammatory red papules, about the size of a grain of corn to a green bean, and later gradually expand or merge into brownish-red plaques, with clear borders, surrounded by an inflammatory red halo, with obvious basal infiltration, and with the surface covered with multiple layers of dry grayish-white or silvery-white scales. Gently scrape off the surface scales, gradually reveal a layer of light red shiny translucent film, called film phenomenon. When the film is scraped again, small bleeding spots appear, which is called punctate hemorrhagic phenomenon. White scales, shiny film and punctate hemorrhage are important features in the diagnosis of psoriasis, which is called the triad sign. Skin lesion morphology: dribbling, coin-like, map-like, ring-like, band-like, generalized, seborrheic dermatitis-like, eczema-like, oyster-shell-like, flat moss-like, chronic hypertrophy, wart-like and so on. 2, the most common parts of the scalp, limb extension, symmetrical distribution; finger (toe) nails and mucous membranes can also be invasive, a small number of armpits and inguinal folds in the Department of the palm and plantar rarely occurs. 3, the course of the disease chronic course, recurrent episodes. Most of the patients are heavy in winter and light in summer, while a few patients are heavy in summer and light in winter. The course of the disease is generally divided into three stages: ① Progressive stage. New rashes continue to appear, the old rash is expanding, thick scales, inflammation, itching, skin sensitivity, can appear isomorphic reaction; ② quiescent. No new rash, the old rash does not recede; ③ regression. Inflammation subsides, scales are reduced, the rash shrinks and flattens, a light halo appears around it, and finally temporary hypopigmentation or hyperpigmentation remains. Differential diagnosis need to be differentiated from seborrheic dermatitis, pityriasis rosea, lichen planus, erythematous furfur, psoriasis, chronic eczema, tinea capitis, discoid lupus erythematosus, eczema with sweat blisters, onychomycosis, and continuous extremity dermatitis. The key to treating psoriasis: find out the cause of the disease, symptomatic treatment The causative factors of psoriasis disease are very many, according to the different causes of the implementation of different therapeutic methods, the type of psoriasis disease is also very much different types, different types, different causative factors, different nature of the use of different therapeutic methods. Treatment of psoriasis should first be diagnosed, and then formulate a treatment plan, and then carry out the treatment.