Abdominal pain could mean a number of things. As there are a lot of vital organs that are there in the abdominal cavity pain could signify a malfunction or a problem in an organ. You need to get your problem evaluated by an expert who would be able to tell you what causes these pains which can wax and wane with time. Depending on where the pain happens it could be attributed to a number of different ailments. If you are feeling a nagging pain on the right side of the abdomen it could mean the following: Constipation: Pain due