A middle-aged man with undiagnosed diabetes developed a serious fungal infection called mucormycosis that affected his sinuses, eyes, and brain. He presented with flu-like symptoms and facial weakness, and blood tests showed dangerously high blood sugar and acid levels (diabetic ketoacidosis). Doctors treated him with multiple rounds of antifungal medications, several surgeries, and innovative injections directly into and around his eyes and spinal cord, resulting in his successful recovery and discharge.