There are many reasons for the pain on the right side of the appendix, which are analyzed as follows: 1, appendicitis, which will be accompanied by right abdominal pain, gastrointestinal symptoms, systemic symptoms and peritonitis symptoms, acute appendicitis can have nausea, vomiting, pressure pain, rebound pain and abdominal tension. Chronic appendicitis will have dyspepsia, loss of appetite and pressure and pain manifestations, you can use antibiotics to control the inflammation, and then actively take surgery to remove the inflamed appendix; 2, cholecystitis, there will be pain, gastrointestinal symptoms and systemic manifestations. Acute cholecystitis will have right abdominal pain or colic, nausea, vomiting, fever, leukocyte elevation, and mental symptoms such as babbling. Chronic cholecystitis will have dull pain or discomfort in the right abdomen, such as acid reflux, belching, bloating, heartburn, and the symptoms are aggravated by consuming fatty and greasy food, which can be treated with medication, oral analgesic, antimicrobial and anthelmintic medication, and then surgical removal of the diseased gallbladder.