Occasionally l feel mild pain (like burning sensation) in my lower abdomen (belt area right side) when I bent or sit with legs folded to abdomen. This uneasy pain is there for more than a year and half. It comes and goes based on my activity level, but I have no problem at all to carry on my regular work at office or home. Nothing has been found by abdomenal sonography and also colonoscopy. Can it be a minor injury to the abdomenal bone or muscle, which is not healing for so all? What should I do to treat this unknown cause of uneasiness, which keeps bothering?