Although not a classic sign or cause of bone spurs -- apparently close relationships can cause later period self healing bone spurs
"“I had a doctor that gave me a letter, a very strong letter, on the heels,” he said.
“They were spurs. You know, it was difficult from the long-term walking standpoint. Not a big problem, but it was enough of a problem.”
Mr Trump could not recall the doctor’s name, nor could he remember when the spurs stopped troubling him. He never had surgery to correct the problem. “Over a period of time, it healed up,” he said."
wow - like magical bits of bone -- divine deossification
"The daughters of a New York foot doctor have explosively claimed their father diagnosed Donald Trump with bone spurs to help him avoid the draft for the Vietnam War.
Elysa Braunstein and Sharon Kessel told The New York Times their dad, Dr Larry Braunstein, delivered the diagnosis as a “favour” to the President’s father, Fred Trump."
