Appendicitis is primarily diagnosed clinically through a physical examination. The patient is asked to lie flat, exposing the abdomen, with legs bent. The doctor stands on the patient’s right side and uses the right hand with fingers together to gently rub the abdomen, pressing on the McBurney's point. If there is significant pain, this is considered positive tenderness. Then, the doctor quickly lifts the fingers; if there is significant rebound pain, it is generally confirmed as acute appendicitis. During acute appendicitis, as the appendix lumen expands and the appendix becomes congested and edematous, ultrasound imaging can also show corresponding signs that serve as an auxiliary diagnosis. Once acute appendicitis is confirmed, it is mostly treated surgically.