Acute appendicitis generally presents primarily as abdominal pain, specifically migratory pain to the lower right abdomen. Initially, the patient may experience stomach pain, which gradually shifts to pain in the lower right abdomen. Whether it is appendicitis needs to be diagnosed by a physical examination by a doctor, or an ultrasound of the appendix during the acute phase can be performed. If the appendix appears significantly swollen on the ultrasound, it can also confirm the diagnosis of acute appendicitis. Typically, the best treatment for acute appendicitis is surgery, especially if the condition is very severe and critical, as it may lead to perforation of the appendix and result in purulent peritonitis, which is very serious and life-threatening. Therefore, once diagnosed with acute appendicitis, it is best to be hospitalized for surgery.