I have one very large scar on my back but I never had many sores at once, I had new sores everyday for the whole time. I could feel them coming, it was like a very long hair being pulled through my skin.
Every winter when my shingles shows up it manifests in an identical pattern.
Two 1/2 inch long by 1/8 inch wide blisters, one at the bottom of each shoulder blade, followed by hundreds of very small itchy sores on the rest of my back. Usually during all this, as the back sores go away, I get them on my waist and belly. The whole thing stops 8-10 weeks later when the original 2 blisters go away.