Visceral herpes zoster following reactivation of dormant varicella-zoster virus can rarely occur, usually in highly immunosuppressed patients, and may present with abdominal pain without the relevant rash. In the absence of skin manifestations, diagnosis of visceral herpes zoster is extremely difficult, while computed tomography may reveal isolated periarterial fat stranding. We describe a rare case of visceral herpes zoster in a medically immunocompromised adult with psoriatic arthritis, who presented with acute abdomen, was diagnosed based on computed tomography findings and subsequent serum polymerase chain reaction results, and was appropriately treated with an uneventful recovery. This case underlines the significance of considering varicella-zoster virus infection as a cause of severe abdominal pain even in the absence of rash in this setting, and highlights the potential role of appropriately performed computed tomography in such unusual and complex cases, where early diagnosis and initiation of treatment is extremely important for a favorable outcome.