You may have heel spurs, or you're shoes are not fitting properly. I stand on my feet the majority if the day, had terrible foot/heel pain, to the point I was going to go to a podiatrist, I decided to try getting some orthotic insoles from Dr. Scholls, I let the machine scan my feet, and purchased the recommended insoles......best investment I've ever made!
Probably saved me a whole lot of money! No more foot pain!