The normal opening of the appendix is round or lip-shaped, with smooth mucosa and no redness or swelling.
The appendix is part of the digestive system and opens at the distal end of the cecum. During colonoscopy, the appendix opens at one end of the cecum and closes at the other end, which can easily cause fecal matter and secretions to collect and form fecaliths, which can lead to acute appendicitis or even appendiceal gangrene, in which case the opening of the appendix and the cecum mucous membrane are red and swollen and pus-filled with exudative fluid.
In chronic appendicitis, the opening of the appendix is not distinctly different from normal, and in this case it is necessary to make an obvious diagnosis by means of imaging.
Appendicitis is the most common cause of acute peritonitis, and a history of metastatic right lower abdominal pain or recurrent right lower abdominal pain requires prompt medical attention.