I read something that said the pain can go on for up to 2 weeks after the rash has gone. I found this info that i have listed below- perhaps it would help? Perhaps more easily recognised would be to try ibuprofen?
What drugs can I take to relieve the pain of shingles?
There are essentially four types of painkillers used to make shingles pain more tolerable:
Aspirin, ibuprofen, and other non-steroidal anti-inflammatory drugs (NSAIDs for short).
Acetominophen, of which the best known form is Tylenol.
Corticosteroids, sometimes called simply steroids.