Drinking mugwort water can’t treat lumbar disc herniation. The occurrence of lumbar disc herniation is mainly due to the degeneration of the intervertebral disc fibrous ring when the patient gets older, the nucleus pulposus protrudes and compresses the nerve, which leads to inflammation and edema in the nerve root area, so there is lumbago and sciatica. Mugwort water does not eliminate the role of nerve root edema, and drinking mugwort water is also unsafe, because mugwort is toxic, Chinese medicine believes that it has a small poison, if taken internally will lead to patient poisoning, so clinically mugwort is generally used externally, such as boiling mugwort water local hot compresses, or made into mugwort local moxibustion to use, can not drink mugwort water.