Hello Thank you for trusting HCM Dear when you undergone radiation therapy, what doctors told about your problem??? Usually radiation therapy can cause,osteoradionecrosis on bone may gives rise pain but when you radiation exposure was done?? Don t worry please consult your radiotherapist /oncologist he will guide in correct way. Radiation may cause mucositis and ulcerformation leads to pain in bowel but as you told scan and scopy are normal. For abdominal pain please consult gastroentrologist. Feel free to ask any query.