Hidden pain in the right side of the abdomen and constipation may be caused by irritable bowel syndrome, appendicitis, intestinal obstruction and so on. 1. Irritable Bowel Syndrome (IBS): Higher stress, frequent excessive tension, anxiety, etc. may trigger IBS, resulting in constipation and right-sided abdominal pain. 2. Appendicitis: The obstruction of the appendix lumen triggers an inflammatory reaction, and fecal retention in the cecum can lead to constipation, causing hidden pain in the right side of the abdomen. 3. Intestinal obstruction: due to intestinal tumors or intestinal adhesions and other causes of intestinal obstruction, intestinal contents can not pass, thus causing constipation, hidden pain in the right side of the abdomen and other symptoms. Right side abdominal pain and constipation may also be caused by other reasons, it is recommended to consult a doctor as soon as possible, under the guidance of a professional physician to identify the cause of the disease, and standardize the treatment, so as to avoid delaying the condition.