What Causes Stiffness In Neck After Decreasing The Dosage Of Prednisone?

HI I have been diagnosed with PMR and GCA I have had a temporal biopsy to confirm this I have been on 75mg of prednisolone for 3 weeks and reduced down to 50mg for two weeks and have to reduce to 35mg till I go next to the clinic this last day I have developed a painful stiff neck is this one of the side effects of taking the prednisolone thank you Arthur