Hidden pain in the right side of the abdomen is commonly caused by the following reasons: chronic appendicitis, colon disease, adnexal disease and so on. 1. Chronic appendicitis: the appendix is located in the right abdomen, if chronic appendicitis occurs, due to the stimulation of inflammation, the right abdomen will be painful, usually hidden pain. 2. Colon disease: the right abdomen is the place where the colon is located, if there is diverticulitis of the colon, colon tumor and other diseases, the right abdomen may have pain. 3. Right adnexal diseases: women may also have adnexal diseases, including adnexitis, adnexal tumors, etc., which can lead to pain in the right lower abdomen, and may also lead to menstrual abnormalities. The right side of the abdomen pain may also be other reasons, it is recommended that the patient to the hospital, you can improve the relevant examination, including stool routine, ultrasound, colonoscopy, etc., usually be able to clarify the cause.