The appendix is located at the end of the cecum and is shaped like a “worm”, with the proximal end connected to the cecum. In adults, the length of the appendix varies widely, usually from 5 to 250 px, and the tip of the appendix can point in different directions. Treatment: including non-surgical treatment and surgical treatment. Non-surgical treatment (1) Simple appendicitis in infants and adolescents, i.e., very mild appendicitis. (2) Periappendiceal abscess. (Some scholars now believe that periappendiceal abscesses should also be operated on as early as possible.) (3) Conservative treatment can be tried when the patient is old and has “too many” coexisting diseases and the risk of surgery is too great. In 1982, Kurt Semm in Kiel, Germany, performed the first laparoscopic appendectomy, which was widely performed all over the world after 1987 and has gradually replaced open surgery. In addition to good cosmetic results, laparoscopic surgery has many advantages: (1) Easy to find the appendix. (2) Wide field of view, the laparoscope can fully explore the intra-abdominal organs. In contrast, traditional open surgery is difficult to fully investigate other lesions in the abdominal cavity due to the small incision, and the leakage rate is high. (3) Postoperative complications of laparoscopic appendectomy are less than those of open surgery: ① Incisional infection: especially in patients with purulent or gangrenous appendicitis or obese body type, the incidence of incisional infection after open surgery is much higher than that of other surgeries, while the incisional infection rate of laparoscopy is very low. Abdominal abscess: When there is more pus or local exudate in the abdominal cavity, it is difficult to aspirate the abdominal pus and flush the abdominal cavity thoroughly in traditional surgery, resulting in easy occurrence of abdominal abscess after surgery. In contrast, laparoscopic surgery can fully aspirate pus in all directions and locations under direct vision and flush the abdominal cavity, so the chance of abscess formation can be significantly reduced. (3) Postoperative adhesive bowel obstruction: laparoscopic surgery is less traumatic, has less impact on the intestine, can aspirate pus and thoroughly flush the abdominal cavity, so the incidence of postoperative adhesive bowel obstruction is greatly reduced compared with traditional open surgery. Although laparoscopic appendectomy has many advantages, it cannot completely replace conventional open surgery. Contraindications are: ① appendicitis with diffuse peritonitis and severe systemic infection ② periappendiceal abscess and periappendiceal inflammatory masses. In addition, it is also necessary to “suit the location” according to the medical level of the hospital where it is performed. Although the mortality rate of appendicitis has decreased over the years due to improved surgical techniques, it is still around 1%, so “although the appendix is small, the surgical risk can be significant”.