Gong's medullary needle is not piercing bloodletting. Gong's medullary needle is not piercing bloodletting. Gong's medullary acupuncture is a kind of acupuncture to treat spinal stenosis, lumbar disc herniation and other diseases. Its principle is to stimulate human bone marrow, regulate qi and blood, and dredge meridians, so as to achieve the purpose of treating diseases. This acupuncture method does not achieve the therapeutic purpose by bleeding to the bone.