Hi. There are a variety of causes of Rt hypochondriac pain. Abnormality may lie in organs such as ,the Gall Bladder, Liver, Duodenum, Hepatic flexure of colon, kidney or more superficially , trauma to the muscles and ribs of the chest. Also, pain on inspiration ( respiratory catch ) may indicate gallbladder and diaphragmatic pleural pathology. Since USG and HIDA scan has not detected any pathology, CT scan with contrast is needed to look for free fluid, fat stranding , mucosal irregularities, masses of the intestines, Liver, kidneys, adrenals, and the retroperitoneum. Calculi, cysts, anatomic abnormalities will be better detected at CT. Pelvic organ pathology , uterine/ ovarian in women , rarely transmit pain in the hypochondrium. Do you also have weight loss? How are the blood tests results? : CBC , CRP, Urine exam and ESR ? Family H/o any disease, previous illnesses need to be correlated. The treatment shall depend upon accurate diagnosis. The GI specialists will perform Gastro-colonoscopy to look for , Inflammatory bowel disease, polyps, diverticuli and tumors in the intestines. Liver biopsy is indicated if you have abnormal Liver function tests. Rx for now: Do not overuse pain killers as they have potential adverse effects. A simple paracetamol should serve the purpose till a diagnosis is reached. Drink plenty water. May be maintain multivitamins too. Refer back with details if possible. Thanks,