When a patient with a hernia comes to the hospital, the physician will usually arrange for the patient to be hospitalized for surgery after making a diagnosis and will tell the patient to use a “patch” during the surgery during the introduction of the surgery. Patients are often confused as to what the so-called “patch” is, and they have doubts as to why the patch is used during surgery, and they are even more worried about whether the permanent presence of the patch in the body will cause harm to their bodies. So, today, I will explain this topic to the general public. The so-called “patch” is an artificial material made of polypropylene, polyester, expanded polytetrafluoroethylene or biological material. It can be safely implanted in the human body, has good compatibility with human tissue, and has good comfort and compliance, so it is widely used in the repair of abdominal wall hernia by processing it into various suitable forms. The essence of abdominal wall hernia is the defect of the abdominal wall structure, and the application of the patch to repair the defect is ergonomic and can reduce the surgical trauma, postoperative discomfort or pain, and significantly reduce the recurrence rate. Especially for more severe abdominal wall hernias, which are often difficult to treat properly with traditional surgical approaches, repairing with patches can make the operation easier and the postoperative results more desirable. With the exception of biologic patches, other patches are not absorbed in the body. However, patients do not need to worry because these patches are compatible with the body and generally do not cause any harm or discomfort to the body. As a result, patch materials are now widely used in the repair of ventral wall hernias, resulting in lower postoperative complication and recurrence rates than ever before for the benefit of patients with ventral wall hernias.