A 56-year-old man presented with a protrusion from the right abdominal wall (Fig. 1A) and acute-onset constipation. Three weeks prior, he had been diagnosed with herpes zoster of the T9-11 dermatome on the right side in an independent dermatology clinic, for which he had received oral famciclovir, pregabalin, and acetaminophen. When the patient visited our Hernia Center and Department of Gastroenterology, he denied having symptoms of bladder dysfunction. He had previously had a regular bowel habit. He stated that the bulging on the right side of his abdominal wall occurred following excessive straining during defecation. This abdominal bulge became more prominent upon standing or execution of the Valsalva maneuver. A physical examination revealed multiple rashes distributed unilaterally accompanied by a hard, overlying crust (Fig. 1B). The lesions did not exceed the midline. The patient’s laboratory findings were unremarkable. Abdominal computed tomography showed dilation of the proximal colon with a concomitant protrusion on the right side of the abdominal wall (Fig. 1C). A diagnosis of segmental motor paresis with coexisting visceral neuropathy was made. The patient was treated with analgesics and combinations of laxatives such as polyethylene glycol 4000 (Forlax, Beaufour Ipsen Pharm Co., Paris, France), prucalopride, pyridostigmine, and misoprostol. These medications ameliorated the severe constipation. At follow-up 2 months later, the distention of the right abdominal wall remained apparent, but the constipation was relieved.