Thank you for the information,
The pain can be due to a few possibilities.
It can be due to pinching of a nerve or its root.
If you develop arthritis of spine then there can be nerve impingement.
This can cause tingling feeling.
It does not seem to be due to kidney disease.
Sometimes gall bladder pain radiates round the right side.
Heart or lung issues can cause pain on this side.
I would advise to get an examination by doctor.
MRI scan, or X ray, EKG, blood tests can be needed.
You are already on morphine.
Further pain medicines need to be adjusted by doctor after determining the precise cause.
I hope this information helps.
I will be happy to assist, if you need any clarification.
Please feel free for any follow up query.