Alice! There is, in fact, a condition called zoster sine herpete (i.e., zoster, the virus, without the herpes blisters), in which nerves are affected without the usual rash associated with shingles.In this case, the nerve involvement causes pain and extreme sensitivity, but the rash just never shows up.lice! There is, in fact, a condition called zoster sine herpete (i.e., zoster, the virus, without the herpes blisters), in which nerves are affected without the usual rash associated with shingles.