Is the voltaren gel good for shingles?

Well, long answer is: diclofenac 3% may be very good for shingles. Reasoning that neuralgic pain from shingles is due to inflamed nerves / nerve bundles just under the skin that exhibit as roughly corresponding rashes. My practical experience is it worked for me ( 50% pain reduction ) when 3% was applied to afflicted nerve bundles in the neck. Nothing else was working well for me, even opioids. Caution, 3% is only Rx’d for keratosis, so you’re going to have to talk your dermatologist into the Rx. Caution, must ID spot treat bundles, not lather the stuff on! It’s strong & can cause complications ( read up ). Try looking up this older article for a start, “Effect of 1.5% Topical Diclofenac on Clinical Neuropathic Pain
Shihab U. Ahmed, et. al.” My Dr. said, “interesting” and that this may be univestigated, overlooked... hope this helps someone...

Voltaren gel is a topical non-steroidal anti-inflammatory gel usually used to treat
pain and inflammation associated with muscles and joints.
It is not typically used to treat shingles pain - check with your doctor though.
Are you wanting to treat post-shingles pain?
Have you tried Lidoderm (a topical anesthetic) or Capsaicin cream?
Talk with your doctor or pharmacist for more information.

https://www.drugs.com/health-guide/shingles-herpes-zoster.html