The old foot problem. As you know its now 12 yrs since I had GB and I still have feet problems but by putting your feet in cold and then hot water several times it shocks them and helps reduce the heavy foot problem for a time.
SKINS, not sure if you have heard of these, but they are a tight fitting special garment that can be worn as a knee high (which I have) that help blood circulation and muscle development .and also help keep your legs warm. My legs are like ice so its been a help.
All sports people us them (rugby players in particular) and there is a web site: skins.co.nz that will tell you all about them.
They are expensive, my ones cost $74 from Rebel Sport but worth it. Wished I had used these much earlier as it would have been a great help and stopped a bit of the pain…