The typical appearance of psoriasis lesions is scaly red spots or plaques, but the specific appearance is different according to the different types of psoriasis, such as common type, arthropathy type and erythroderma type. 1. Ordinary type psoriasis: the appearance is scaly red papules or macules on the skin, and then with the development of the disease, it turns into scaly red plaques with clear boundaries. The appearance of this red plaque is coin-shaped, teardrop-shaped, irregular shape, etc. There is a layer of silvery-white scales covering the plaque, and when the silvery-white scales are scraped off, such as scraping off the wax droplets, and after scraping off the skin, it can be seen that the skin is covered with a light-red glowing semi-transparent film. 2. Arthropathic psoriasis: besides the above manifestations on the skin, the distal joints of the limbs are often involved, which manifest as swelling and pain, and even sacroiliac arthritis, sternoclavicular arthritis, temporomandibular arthritis, and so on, can appear. 3. Erythrodermic psoriasis: manifested as diffuse redness, infiltration and swelling of the whole body skin with a lot of furfuraceous scales, between which there can be flaky normal skin. It is recommended that patients with suspected symptoms of psoriasis should go to regular hospitals in time, and follow the doctor’s instructions for standardized treatment after a clear diagnosis.