Talk to Neuro Physician on Diabetic Neuropathy

My mother is diabetic and has difficulty walking. She does not complain of severe pain, but she feels unable to properly lift or move her legs while walking and often drags her feet. Her HbA1c is 8.4%, and her blood pressure is frequently high. She also has stiffness and weakness in one arm (frozen arm). What could be the possible reasons for these symptoms? her lft, rft, cbc, ers are comletly normal and crp is 10{should be 5}