CONCLUSION: the sacral canal injection is effective in relieving pain, improving symptom and recovering the ability of daily life in patients with LDH.

Objective to discuss the reasons and managements of the "setback" of the symptoms and signs in lumbar disc herniation patients after the treatment with medical ozone.

Hernia Lumber Disc refers to a group of symptoms and body signs caused by pressure and stimulation to spinal marrow or nerve root due to fibrous ring rupture and pulpiform nucleus protrusion.