Introduction: Urachus, median umbilical ligament, is normally obliterated in early infancy. So being remnant, is uncommon in adults. Delay in diagnosis and management can present with complications like drainage from umbilicus, severe abdominal infection, cyst with stone formation, fistula to urinary bladder, peritonitis, lump abdomen or carcinoma. Diagnosis remains challenging due to the rarity of this lesion and the non-specific nature of its symptomatology. Case Report: We report a case of a 35-year-old female presenting with umbilical sepsis with abdominal (suprapubic) pain. Investigations and laparotomy lead us to a confirmative diagnosis of infected urachal cyst. Conclusion: Urachal anomalies are rare in adults. Presentation is atypical therefore a high index of suspicion is required in order to achieve a diagnosis. Complete surgical excision is the treatment of choice due to the risk of malignant transformation.