chilblains

I tried urine therapy a couple years ago and my toes started swelling up and itching. It's called chilblains and it's a circulation problem similar to frostbite. I stopped urine therapy and my toes cleared up. I tried it again in the summer cause chilblains are only supposed to occur in cold weather but my toes swelled up again. I stopped again and haven't done urine therapy in years but every winter I get chilblains and it lasts for months. Everything I've read on chilblains says just to keep feet warm to prevent it but that hasn't helped. Anyone know how to get rid of this or prevent it?