Nerve blocks generally last from a few hours to a few days at a time, and correlate with the individual patient’s physical condition and primary disease. Nerve block is a local injection treatment, in which the doctor injects local anesthetics (e.g., lidocaine, procaine, etc.) into the nerve root of the patient to temporarily block the nerve discharge and conduction, in order to achieve the effect of pain relief. There are individual differences in the duration of nerve block therapy, and it is also correlated with the patient’s primary disease. In patients with breast cancer pain, the duration of one nerve block treatment may last only 3~5 hours. In patients with sciatica due to lumbar disc herniation, the efficacy of nerve block treatment may last for 5-7 days or even 14 days. Nerve block treatment needs to be carried out by specialized and experienced physicians, so it is recommended that patients go to the Department of Neurology or Pain Medicine of a regular hospital. According to the patient’s specific condition to implement the appropriate treatment program, to avoid causing nerve damage.