Chronic appendicitis can be detected by CT examination, which can find abnormal thickening of the appendix and other manifestations. The imaging of chronic appendicitis is mainly based on ultrasound and CT. CT examination of the appendix, if there is thickening of the appendix, as well as appendiceal wall thickening, appendiceal lumen of the bar-shaped dense shadow and lymph node enlargement and other manifestations, suggesting that the existence of chronic appendicitis may be. CT diagnosis of chronic appendicitis is characterized by high resolution and high diagnostic accuracy. In addition to CT, ultrasound is also a commonly used test for chronic appendicitis, which is less expensive and easier to perform than CT, and is a common screening tool. In chronic appendicitis, ultrasound shows thickening of the appendix, abnormal internal echogenicity, and poor mobility. If any of these imaging abnormalities are present, or if chronic appendicitis is suspected, it is recommended that a hospital visit be made.