I had shingles seven years ago on my left middle back. Now I get periods of strong internal pain in the exact area. Can this pain be related from the shingles I had seven years ago?
Yes, it could be. Post-herpetic neuralgia or post-shingles pain, happens to about 10% of the people who come down with shingles. The virus could have caused chronic inflammation in the area and/or disrupted the pain producing pathways there; the virus is gone but some disruption remains.
Topical ointments may help as well as a variety of other treatments - although it may take awhile to pin down what is most effective. Good luck!
Here are some links that might be helpful to you:
Using Tylenol Responsibly
What Can Be Done About Nerve Pain?