You're welcome! BTW, another condition that causes pain in the ball of the foot is neuroma.
Making a diagnosis is often difficult, especially when you are dealing with a disease like PN, which can mimic so many other conditions, and changes day by day, for no apparent reason.
This is one of the reasons to be sure to see a qualified physician to diagnose and treat medical problems. Unfortunately, there is no guarantee of a cure, but there is the potential for some relief.
Good luck!