A 23-year-old male presented with fever, chills, body pains, headache, and dysuria for one week. He has a history of ulcerative colitis treated with mesalazine and prednisone. Examination found elevated white blood cell count and numerous pus cells in the urine. He was diagnosed with a urinary tract infection complicating his ulcerative colitis. Treatment included antibiotics, antipyretics, hydration, and continuation of his ulcerative colitis medications. His symptoms improved over three days of treatment and monitoring.