Analgesic pump, not analgesic stick.

The analgesic pump is just a medical device, and what works is the medicine added to it. Generally, they are analgesics or local anesthetics, which are pumped at a certain rate to achieve a stable analgesic effect.

Analgesic pumps administered by different routes have different medication methods and principles. For example, after using an epidural analgesia pump, there is basically no pain.