We experienced a case of cutaneous nocardiosis in a 75-year-old, healthy male patient. About a month before his first visit to our hospital, the patient fell and was injured. He had a bruise on his left forehead and was treated at a nearby hospital, but it did not improve. He underwent abscess culture due to his atypical course, and a cutaneous Nocardia infection was suspected. In cases of suspected cutaneous nocardiosis, it is necessary to ask questions about the patient's history of outdoor trauma, perform relatively long-term wound culturing, identify the causative Nocardia species, carry out drug-susceptibility testing, and rule out systemic nocardiosis. Sulfamethoxazole/trimethoprim combination drug therapy is the first-choice treatment, but side effects may occur, as was seen in our patient. Special attention is required in such cases because long-term treatment is required.
