In the early 1990s, Dr. John C. Lowe used the term in 20 or so articles published in chiropractic publications. Soon, other writers and practitioners within chiropractic and massage therapy followed suit. During the 1990s, however, some practitioners and patients began using the term in a more generic sense. They began using the term to refer to most any form of bodywork in which practitioners address their patients' soft tissue problems. As long as the practitioners of the different approaches address their patients' myofascial tissues, the term seems to properly apply.
Some people use the term myofascial therapy to refer to any form of soft tissue treatment.
It's debatable whether this is always proper. In this case, to apply the term myofascial therapy seems imprecise. For example, they may cause a biomechanical imbalance. Or they may compress and activate myofascial trigger points. If speeding the healing and repair of the ligament helps relieve the myofascial complication, it seems proper to classify the treatment of ligaments as myofascial therapy.