Do you mean that you're not on any DMT's yet? If that's the case, please find a different neurologist. There isn't a whole lot you can do, but try hot or cold packs, menthol-based pain-relieving creams, and elevating your feet. If you're in the midst of the British heatwave, soaking your feet in cold water at random intervals during the day might help a bit. I use a hot water bottle on my lower back every night to ease the pain in my legs. If I don't use it, everything's worse the next day. I don't know if it would help the numbness, though.