In 1996, McMakin began using frequencies from a list created in the 1920s to treat her patients. After testing the frequencies and treatment protocols to ensure their reproducibility, she presented her results at the American Back Society national meeting and published her first fifty cases of neck pain in August 1998.

A year later, McMakin discovered a frequency treatment protocol that could alleviate the full body pain of fibromyalgia associated with spine trauma in just sixty minutes. This breakthrough led her to continue presenting cases and teaching seminars around the world since 1999. Today, physicians and practitioners worldwide use her protocols to help their patients.

McMakin has also authored two books, including “Frequency Specific Microcurrent in Pain Management,” published by Elsevier in 2010, and “The Resonance Effect,” also published by Elsevier, in 2017. In addition to treating patients and publishing articles, she continues to teach courses on Frequency Specific Microcurrent therapy globally and maintains a part-time practice in Troutdale, Oregon.