The clinical injection for patients on the waist is mainly for patients with problems such as lumbar disc herniation, which causes patients to have clearer pain points and can actively carry out local closed injections. Usually, vitamin B1, vitamin B12, lidocaine and dexamethasone can be applied for local closed injection, which can effectively relieve the patient’s back pain symptoms. However, one thing to note is that the closed injection should be done in a regular hospital, not in a small outpatient clinic. Sometimes, if the closed injection is too deep, it may cause cerebrospinal fluid leakage or damage the spinal nerve roots. In severe cases, the patient may have leg pain, leg numbness, leg weakness, or even abnormal urination and defecation, which is very dangerous.