Great artwork there you found on your walk. All the best for the procedure on your leg.
Just last year I was having consistent cramps in my right leg after doing a walking challenge. I probably hadn’t stretched well or enough. My feet also started feeling cold. I got a deep tissue Taiwanese foot massage and it brought back life to my feet. I know that warm feeling you mentioned. I was advised to keep my feet warm. Now that the months are colder, I wear real warm socks at home,try to take long warm baths and sometimes just insert my legs (up to my calves) in very warm water. It helps to relax the muscles,keep the feet warm and the blood circulating. I also try to have more warm beverages to keep the body in general, warm. I don’t know if any of these tips might be useful.
All the best. 😃