Hey man, I have had shingles too. It is a dormant piece in the spinal nerves from when you had chicken pox. I got mine from when my son had his chicken pox vacination in Florida. It triggered my reaction. Never had it before that. Make sure you inform the family from now on that if anyone has the pox or is getting a vacination that they do not come around you for a while as you can have another episode.
Take it easy bro,