Many doctors use the term “keloid” to explain scarring in postoperative patients, and this often leads to the patient recognizing his or her own misfortune. In fact, there is no concept of “keloid” in any professional book. The author prefers to think of it as a lack of understanding of keloid scarring and its prevention, or as a way to cover up the deficiencies of one’s own surgical skills. This so-called concept may be derived from the term “allergy”, which means that the body is sensitized to a certain substance or substances, and after sensitization, allergic symptoms will appear as soon as it comes into contact with it again. Keloid scarring, on the other hand, is a very low probability for yellow people to develop keloid or hyperplastic scarring after a minor injury, except for the front chest and shoulders, which are the most common areas. Many of the postoperative incision scars that patients now seek to have repaired are actually avoidable. For example, postoperative scarring after a longitudinal abdominal incision used for cesarean delivery is a classic case. The existing medical system, resulting in doctors like the railroad police, each in charge of a section, obstetricians care about the mother and child safety, the rest has nothing to do with him, half a year after the operation, scar hyperplasia, itching and pain symptoms appeared, the dermatologic surgeon is responsible for it. In fact, this should not have happened.