Psoriasis is a common chronic skin disease, the symptoms of its lesions are not only painful and itchy, and often occur in the exposed parts of the human body, thus making the patient’s body and mind suffer great harm, psoriasis of the extremities type is one of them, i.e., psoriasis that occurs in the arms and legs. The symptoms of psoriasis of the limbs in the early stage of the onset of the disease are: red dots on the skin that are as big as a grain of corn to as big as a soybean, with the development of the disease, the dots will gradually expand and increase, and even merge with each other to form a piece, and the bottom of the infiltration is obvious, and the edge is clear, and there is a halo of inflammation around it, which is in the form of a dot-drop shape, a coin shape, a map-like shape, a disk-like shape, and oyster-shell shape, and so on. 1, the skin lesions of psoriasis of the limbs are covered with thick gray-white or gray-yellow scales, and the scales are easy to fall off, mostly accompanied by itching; 2, in the early stage of the onset of psoriasis of the limbs, the scales of the skin lesions are easy to fall off, and after scraping off the scales of the patients, a layer of light red translucent shiny film can be revealed, which is called the “film phenomenon”; 3, the appearance of light-red semi-transparent shiny film is known as “film phenomenon”; 4, the appearance of light-white scales is known as the “film phenomenon”. “3, the appearance of light red translucent shiny film, and then gently scrape off the shiny film, visible erythema surface gushing out the size of corn grain blood beads or pinhole-like hemorrhage points, known as the “punctate hemorrhage phenomenon”. Psoriasis of the limbs patients need to pay special attention to is the first application of lukewarm water bath, prohibit the use of strong alkaline soap, shampoo bath, keep the indoor air fresh and circulate; the second should wear clean and soft clothes, regular replacement of underwear and bed linen, to prevent skin infections; the third to avoid traumatic injuries, to prevent scratching and strong stimulation of the extremities of the psoriasis, so as not to produce new skin lesions; the fourth to avoid catching the wind and cold, to prevent upper respiratory tract infections Finally, the daily diet of psoriasis of the extremities patients, generally give the general food on the line, patients should be light, less alcohol, do not eat easy to cause allergic reactions to food. Psoriasis of the extremities brings a lot of harm to patients, not only can cause protein and other nutrients loss, but also may lead to systemic damage and infections, bringing endless suffering to patients, so patients should be actively treated, comply with the doctor’s instructions standardized medication, to achieve clinical cure as soon as possible.