Shingles=herpes virus. You might find L-Lysene to be helpful. Herpes viruses never go away, they are only contained by your immune system. Physical and/or emotional stress can suppress your immune system, and the herpes runs rampant.
So, a program to control your emotional stress might be of benefit. Meditation, self-hypnosis, or binaural recordings might help reduce your stress level.
It is my understanding that shingles can be excruciating painful. If you have shingles, I am glad that at least you have been spared that particular symptom.