Hello Thank you for trusting HCM Dear appendectomy involves manipulation of the bowel, you might experience diarrhea for a few days after the procedure. Constipation can also occur, primarily due to narcotic pain medicines that may be prescribed. Ileus -- temporary lack of normal bowel contractions -- can occur with any type of abdominal surgery. Symptoms include nausea, vomiting and abdominal distention. This condition normally resolves on its own within a few days, although it may prolong your hospital stay. After one month of appendisectomy pain means there is is chances of adhesions or infection lead to pain. It may be due to Irritable bowel syndrome or due to inflammatory bowel problems. Please consult your doctor he will examine and treat you accordingly. I think I answered to your question if you have more questions feel free to ask. Take care