Welcome @maureenw, My PMR is currently in remission but I often have the desire or urge to scratch the top of my head even though I wouldn't consider it itchy. I found this interesting article that might explain the tingling.

"A tingling feeling in the scalp (paresthesia) can occur for many reasons, including anxiety, ASMR, chemical irritation, medication, migraines, nerve compression, skin sensitivity, and underlying health conditions. If you have chronic (ongoing) scalp tingling, see your healthcare provider." --- What Causes Tingling Scalp?: https://www.verywellhealth.com/tingling-scalp-causes-treatment-5216016.

Does your doctor have you on prednisone to treat the PMR and suggested a plan to taper off?