Yes, cannabidiol (CBD oil) does show good results in helping stabilize the blood sugar and improves the way the body deals with carbohydrates as well as reducing inflammation and the pain of inflamed nerves known as neuropathy. Regular use of CBD does tend to lower the blood pressure. Your mother may be able to totally prevent the development of diabetes by using CBD. You do not mention where her back pain is located but if it is around the ‘bra line’ it may be referred pain from her pancreas and further tests maybe indicated so be sure she follows up with her PCP. Do considered treating the back with Cannabis salve because it should give her relief from her back pain.