Yes the liver is involved with herpes zoster. You can have it without the rash as well, and just guessing, the blisters. I am in the midst of my first attack now. There have been many reports of new cases since vaccination but that excludes me. However, some saying the unvaccinated are getting it too. Is it only on one side? It's hard to tell on the pic. A blood test would show but finding a doctor willing would not be easy. They are often uneducated about shingles.