Do not order Lyme disease serology as an explanation for musculoskeletal symptoms without an exposure history and exam findings.

Lyme disease is most likely to occur if an individual resides in or visits an endemic area. The most common musculoskeletal (MSK) manifestation of Lyme disease is persistent or intermittent arthritis in at least one joint (typically the knee) which develops within weeks to months after a tick bite. Chronic diffuse arthralgias, myalgias or fibromyalgia alone are not criteria for MSK Lyme disease. Testing for Lyme disease should be limited to children with characteristic clinical signs and risk of exposure to Lyme to avoid false positive tests and unnecessary treatment.
For more information:

Government of Canada, Surveillance of Lyme Disease. [Internet].

Lantos PM, Rumbaugh J, Bockenstedt LK, et al. Clinical Practice Guidelines by the Infectious Diseases Society of America (IDSA), American Academy of Neurology (AAN), and American College of Rheumatology (ACR): 2020 Guidelines for the Prevention, Diagnosis, and Treatment of Lyme Disease. Arthritis Rheum. 2021;73(1):12-20. PMID: 33251700.

Lipsett SC, Nigrovic LE. Diagnosis of Lyme disease in the pediatric acute care setting. Curr Opin Pediatr. 2016;28(3):287-293. PMID: 27138805.