My mother in law has diabetes since 7 years and she has not been taking medicine as she was controlling it naturally. Consistently for last few months her fasting reading is around 137 and post meal is around 173. Should she start taking medicines? She is getting burning and numbing sensation in middle 3 fingers of her both feet since few months (mostly this happens daily after evening and at night only). We are wondering if it could be because of diabetes problem.