In the past, people thought this disease was a simple skin disease. With the development of research, people gradually noticed the systematic changes in patients with this disease. Modern studies have shown that psoriasis occurs not only in the skin, but also in the internal organs (such as the heart, liver, kidney, eyes, etc.) and other tissues, causing damage to the patient's overall health. In various types of psoriasis, pustules, erythroderma and arthropathies usually affect general health to varying degrees. When psoriasis vulgaris is serious, it will affect the health of the whole body to different degrees.