It would be good to check with you PCD and a neurologist on this. Neuropathy can come with MGUS, but that is generally in the extremities. I have polyneuropathy, which is likely due to my celiac rather than MGUS; it is mainly loss of sensation in my hands and feet, including feeling less pain. A full evaluation could give your some answers and treatment for the causes. I'm 70 and spend a lot of time on diet, exercise, and other healthy stuff, just to balance out my various body parts that conspire against me.