The Bladder meridian, the longest meridian in the human body, runs along the back and legs, often linked with pain, stiffness, and stagnation. 👉 With a 100 mm filiform needle, penetrating needling can: ✅ Reach deeper tissues & unblock meridians ✅ Relieve back stiffness and lower limb pain ✅ Harmonize Qi & Blood through the full meridian pathway This advanced technique not only requires precise skill, but also embodies the TCM principle: “Where the meridian flows, disorders can be treated.” 📌 C