The causes of right lower abdominal pain one year after appendicitis surgery can be manifold, such as local adhesion after appendicitis surgery, other systemic diseases, such as pelvic inflammatory disease, adnexitis or tumors in the adnexal area, and so on. 1. Localized adhesion after appendicitis surgery: the pain in the right lower abdomen one year after appendicectomy, the first consideration is adhesive intestinal obstruction caused by localized adhesion after appendicitis surgery, which causes hidden pain and discomfort in the right lower abdomen, and nausea, abdominal distension, even vomiting or intestinal obstruction can also occur. The degree of intestinal obstruction can be clarified through colonoscopy, and in severe cases, adhesion release treatment can be carried out under laparoscopy. 2. Hidden pain in the right lower abdomen can also be caused by other systemic diseases: such as chronic pelvic inflammatory disease, adnexitis, or benign or malignant tumors in the adnexal area, there will also be hidden pain in the right lower abdomen, accompanied by abnormal vaginal secretions or menstrual changes. One year after appendicitis surgery, the right lower abdominal pain is also seen in other causes, need to consult the doctor in time, by the professional doctor to give the relevant examination, clear diagnosis, for the cause of the treatment.