“…1,2 Cystitis involves direct invasion of the bladder wall by the varicella-zoster virus, resulting in dysuria and increased urinary frequency or retention. 1,2 In neuritis, the varicella-zoster virus in the unilateral sacral dorsal root ganglion spreads into the bilateral sacral motor nerves, interrupting the bilateral detrusor reflex, which manifests as an underactive bladder, as in this patient. 1,2 In myelitis, suprasacral spinal cord inflammation causes a spastic bladder.…”