The Efficacy of Thread Embedding Acupuncture on Pain Score, Neck Disability Index, and Pressure Pain Threshold for Myofascial Pain Therapy in the Upper Trapezius Muscle

Inclusion Criteria: * Male or female aged 18-59 years. * Subject with myofascial pain in the upper trapezius muscle. * VAS score of 30-70 mm from 100 mm during activities (everyday activities or light exercise). * Pain \> 3 months. * Willing to participate in this research to completion and sign informed consent. Exclusion Criteria: * Fibromyalgia. * Have had cervical spine surgery. * Have done Dry needling therapy on the upper trapezius muscle in the last 9 days * Have done thread acupuncture on the upper trapezius muscle in the last 6 months. * Have performed pharmacopuncture on the upper trapezius muscle in the last 6 months. * VAS score is more than 70 mm than 100 mm at resting. * History of anti-inflammatory drug treatment in the previous 2 weeks. * History of intra-articular steroid injections in the previous 3 months. * There is a tumor, wound, or skin infection at the needle insertion area. * Fever (≥ 37.5 oC). * There is a hypersensitivity reaction in previous acupuncture therapy (metal allergy, severe atopy, keloids, or other skin hypersensitivity). * Suffering from a blood disorder or taking blood thinners (anti-platelet or anti-coagulant drugs). * Have a heart condition or uncontrolled diabetes. * Blood glucose level (GDS) ≥200 mg/dL is checked by capillary blood using a glucometer.