I broke my heel bone about 20years ago and recently have had pain ,swelling if i walk to much and numbness and theres like a knot on my heel thats been there since i broke it.

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A) A knot on bottom of foot could be the following -

  • Plantar Fibroma
  • Plantar facitis
  • Malunion of bone after the fracture.
  • Small tumor ( rare)

I would advice that you visit a orthopedic doctor and get the swelling evaluated.