Mild pain in the right lower abdomen may be chronic appendicitis or appendiceal cancer. Chronic appendicitis usually presents as vague pain in the right lower abdomen, that is, pain of a milder nature. It is usually secondary to acute appendicitis, i.e., a history of acute appendicitis, and the pain is relieved after anti-infection treatment. However, the condition may progress to chronic appendicitis, with frequent pain in the right lower abdomen, which is vague. The pain is more pronounced especially after walking for a long time or when the resistance decreases. At this time, ultrasound examination of appendix and barium enema can be performed for further clarification, and laparoscopic appendectomy is recommended after clarification. It may also be caused by appendiceal cancer. Generally, the pain is not very obvious in the early stage of the tumor, and sometimes it may not feel anything. When the mass increases in size or causes incomplete intestinal obstruction, it will show pain in the right lower abdomen. At the same time, there may be changes in bowel habits and characteristics, such as thinning of stools, increased frequency of stools, coffee-like stools, brown stools, or bloody stools. If necessary, abdominal CT or colonoscopy will be performed to further clarify the situation, and radical tumor surgery is recommended after clarification.