Contiguous infections and systemic dissemination of pathogens are the most frequent causes of
osteomyelitis, being the S aureus the major causal agent in both cases. Osteomyelitis secondary to human
bite is a rare and severe complication of this wound mechanism. This lesions is difficult to diagnose in the
emergency department, both for its infrequently as the lack of information about the origin of the lesion on
the part of the patient, for fear of the medical-legal consequences. In addition, due to the variety of
aerobic and anaerobic pathogens, constitute a true therapeutic challenge. We present the case of an
osteomyelitis secondary to human bite, which presents all of the clinical and radiographic signs that should
make us suspect this pathology and begin the management quickly, as it represents the main prognostic
factor. The wound by human bite should be suspected and treated properly in the emergency epartment,
since the first 24 hours are crucial for the later forecast. The cooperation between specialists reduces the
risk of complications, being the emergency department the most important factor to its diagnosis