I had a lot of feet pain before I started NB because of copper toxicity. I seriously use to crawl around my house on my knees because it hurt so bad to walk. The heel pain was the worst. I had a bunch of doctors try to tell me it was plantar fasciitis but I knew it wasn't after I eventually started getting a similar pain in my finger tips. The finger tip pain developed when I was at my worst but was also one of the first symptoms to go away.