Hello @nyxygirl, Welcome to Connect. New members are not allowed to share links for a short period of time to prevent spamming in our discussions. I thought I would share the UpToDate article for you so for others who have not seen it.

--- Clinical manifestations and diagnosis of polymyalgia rheumatica: https://www.uptodate.com/contents/clinical-manifestations-and-diagnosis-of-polymyalgia-rheumatica.

I see that you have already found one of the main PMR discussions - Polymyalgia Rheumatica (PMR): Meet others & Share Your Story: https://connect.mayoclinic.org/discussion/polymyalgia-rheumatica-pmr-meet-others-share-your-story/. Here is another discussion you might find helpful:
--- PMR Dosages and Managing Symptoms: https://connect.mayoclinic.org/discussion/pmr-dosages/.

My rheumatologist never used the term gel phenomenon but did do a good job of explaining the morning stiffness to me along with the importance of mild exercise and stretching in the morning. He also taught me the value of keep a daily pain and dosage log to help me when I was tapering off of prednisone. I was started at 20 mg prednisone for both occurrences of PMR and within an hour or so of taking the prednisone, all of the aches, stiffness and pain were gone until the next morning. It's great that you have done a lot of research on the condition. It pays to be your own health advocate.

Did your doctor or rheumatologist tell you to watch for other symptoms like tender scalp or pain around the temple areas to make sure you also don't have GCA?