There an be several reasons for right sided pain, including muscle causes, kidney stones, or abdominal diseases (i.e. irritable bowel disease, appendix disease). The CT scan would evaluate for kidney stones as well as the appendicitis.
You can consider a spinal MRI to evaluate for a herniated disk. A referral to an orthopedist or physical therapist can be considered of the pain continues.
If the bowel continues to be suspected, a colonoscopy can be performed.
These options can be discussed with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_
Just thought I would throw this out there. For two years no one could figure out my back pain or the pain up under my ribs which was much worse than my back pain. My bowels were also effected. After four specialist I was sent to a pain clinic. They were planning on doing a nerve block. Just by chance, the day I went for my second appointment, I insisted on an MRI due to horrible spasms in my back. Everything I had was found to be related to a severely herniated disk at T10-T11. They replaced it with one of my rib heads and all the pain is gone. I would definitely check into the MRI.
Good luck to him! I know what living with chronic pain is like.