Painful Heel Lump or Bump on the Back of the Foot [Best Treatment!] Painful Heel Lump: Back of the heel pain is usually Achilles tendinitis, a bone spur, or Achilles bursitis. Make 100% sure your Achilles heel pain stops! Bump on the back of my foot treatment video: https://youtu.be/Y1sMEi7LNuA Painful bump in the back of … Read more