I have a callus in the sole of my foot. i have been with it for 2 and a half years. it is not painful and it doesn't bother me. how should i treat it?

I would see : A foot doctor who can confirm that is all it is and could remove it and explain to you why it was there from a biomechanical perspective.

Biomechanical: A callus can be a sign of a biomechanical problem of the foot and can need custom orthotics to correct the problem. At times, a plantar wart can appear to be a callus and can be treated with a topical wart acid..