OBJECTIVE: To compare the effects of pressure release (PR), phonophoresis of hydrocortisone (PhH) 1%, and ultrasonic therapy (UT) in patients with an upper trapezius latent myofascial trigger point (MTP). DESIGN: Repeated-measure design. SETTING: A pain control medical clinic. PARTICIPANTS: Subjects (n = 60; mean +/- SD age 21.78 +/- 1.76y) with a diagnosis of upper trapezius MTP participated in this study. Subjects were randomly divided into 4 groups: PR, PhH, UT, and control (15 in each group). All patients had a latent MTP in the upper trapezius muscle. INTERVENTIONS: PR, PhH, UT. MAIN OUTCOME MEASURES: Subjective pain intensity, pain pressure threshold (PPT), and active cervical lateral flexion range of motion were assessed in 6 sessions. RESULTS: All 3 treatment groups showed decreases in pain and PPT and an increase in cervical lateral flexion range of motion (p < 0.001) compared with the control group. Both PhH and PR techniques showed more significant therapeutic effects than UT (p < 0.001). CONCLUSIONS: Our results indicate that all 3 treatments used in this study were effective for treating MTP. According to this study, PhH is suggested as a new method effective for the treatment of MTP.

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