Psoriasis, commonly known as "牛皮癣", is notorious for the appearance of red macules on the skin covered with scales. It not only spreads throughout the body but also recurs frequently, causing great suffering to patients. Previously, after publishing articles such as "Beware of the Onset of Psoriasis", they were affirmed by professionals and well-received by a large number of patients. Many patients have written letters or called to inquire. So why does psoriasis recur? How can we more scientifically and effectively prevent and treat psoriasis? In response to the strong demand from many patients, in this issue's health topic, our program has once again invited Ms. Lanru Liu, a renowned Chinese expert in psoriasis, to address relevant issues.