Treatment Validation for Myofascial Pain

The goal of this clinical trial is to see if a special body measurement biomarker (called the NUN biomarker) can show changes after dry needling treatment and if it can predict who will get the most pain relief. The study focuses on adults with chronic low back pain (cLBP) that also has a muscle pain (myofascial pain, MP) component. The main questions it aims to answer are: 1. Does the NUN biomarker go down after dry needling when muscle pain gets better? 2. Can the biomarker predict who will feel better after treatment? 3. Do people with higher biomarker levels at the start respond better to dry needling than to a fake (sham) treatment? Investigators will compare real dry needling to sham dry needling (fake treatment) to see if the biomarker changes more with real treatment and if this matches pain relief. Participants will: 1. Get either real dry needling or sham dry needling in a single-blinded setup (participant won't know which one they're getting). 2. Have ultrasound imaging to measure the biomarker before and after treatment. 3. Take a pressure pain test to see how sensitive their muscles are. 4. Report their pain levels after treatment.