How long does it take to resolve Piriformis Syndrome?

@carolcompton That's an interesting question, but I have an observation. In my experience, performing syndrome takes time for the irritation/inflammation to form - not just a single night of sleeping on a replaced hip.

There are exercises to do, but you must also eliminate the underlying cause, whether it is sitting too long, incorrect posture, repetitive motion, poor posture or muscle weakness.

Here is a recent disussion on the topic:
https://connect.mayoclinic.org/discussion/does-anyone-else-have-issues-with-piriformis/
When I had issues (both before and after bilateral hip replacements) my PT gave me a series of exercises to do twice a day, followed by ice. Whenever it threatens, I go back to the exercises and ice before it gets bad, and try to figure out what brought it on. For me it is usually sitting or standing too long without moving around- which happens when I am in the midst of intense projects.

Thanks for this. It was a good reminder that I have been sitting in front of the laptop for hours since on Christmas vacation began. I do watch series while lying on the couch, laptop on tummy, but will try to do less sitting, even if I am perched on several pillows.
I am at least thankful that I didn't dislocate the fake ball and socket, which was my first thought, since the pain was so severe, at first.''
When I go to the doctor for my frozen shoulder, the original problem, I can get a ''two for one'' deal.