Limited opening secondary to Lyme disease in an 8-year-old child.

In the United States, Lyme disease is the most common vector-born disease. It often presents with a wide variety of symptoms that may delay its diagnosis and present challenging patient management issues. The purpose of this report was to discuss the case of an 8-year, 6-month-old Hispanic male who presented to a hospital emergency room with restricted mandibular opening and was diagnosed with Lyme disease after an initial period of uncertainty regarding the diagnosis.