You can use whatever sugar substitute you wish. A good working knowledge of your disease will keep your chronic condition in better control. I am 62 and starting to have some numbness in my feet. I think it may be related to my diabetes. Numbness can be a symptom of poor circulation, especially in the legs and feet of people with diabetes.
Poor circulation can make injuries and infections more difficult to heal.
Wear comfortable shoes that do not rub. Do not go barefoot. Do not use corn cures or iodine on your feet. Avoid hot water or heating pads. Do not cut corns or calluses Do not use tight socks or cross your legs when sitting.