Treatment Validation for Myofascial Pain

Brief Summary

The goal of this clinical trial is to see if a body test called the NUN biomarker can track changes in chronic low back pain after dry needling and predict who will feel better. This study is for adults with chronic low back pain from muscle pain (Myofacial Pain). The main questions are: * Does the biomarker drop when pain improves? * Can it predict who benefits most? * Do higher starting levels mean better results with real dry needling? Investigators will compare real and fake (sham) dry needling using ultrasound, muscle pressure tests, and pain reports before and after treatment.