Do epidurals wear off?

Yes: The medicaiton that is used slowly wears off. They can give you more medication if needed so that you can have an epidural for several days if needed.

Sometimes: Usually a small tube called a catheter is placed into the epidural space, and then medication is administered via the catheter. Often, a pump is connected to continuously supply medication for anesthesia or pain control. Occasionally the medication can "wear off" some or your pain can intensify, in which case additional medication can easily be administered through the catheter to help the pain.

Yes: Epidural anesthesia or analgesia can be administered as a single shot or continuous infusion. Either way, once the medicine is no longer being administered it will wear off.

Yes: For labor epidurals, they only last until the last medication is cleared from the epidural space by your body, usually a few hours after turning it off. The associated numbness and weakness should be gone permanently. Epidural steroid injections can reduce nerve irritation, though it may take multiple injections to calm the nerve.

Labor epidural?: If you mean a labor epidural then yes it can happen. It occurs due to rapid progression of labor which leads to pain in areas not covered by the epidural. The catheter can pull back. Often all that is needed us a bolts of local anesthetic.