Pain pump is a liquid infusion device, which is a disposable cartridge containing analgesics, sedatives, etc., and is administered into the body through an electronic or mechanical pump, such as through intravenous, subcutaneous, epidural, nerve block, etc. to give the corresponding analgesia in the surgical area, labor analgesia or control cancer pain, usually allowing the patient to press himself, with an additional infusion dose on top of the continuous dosing, and the treatment is accordingly Individualized. Patients mostly show pain after surgery, but nowadays pain is classified as the fifth vital sign, which also needs to be addressed, especially post-surgical pain, childbirth pain, cancer pain, etc. can be addressed by analgesic pumps.