That could be it, the extra strain on the foot could cause this condition. Have you had your foot checked for bone spurs? These can form and cause this condition as well, also makes it hard for the tissue to heal.
I didn't find the inserts helped at all, but everyone is different so give them a try.
My bout started with some slightly ill fitted shoes I wore off and on for about 3 months hoping they would 'break-in', the arch support was a little higher than usual and I could feel it on my feet, didn't think too much about thinking they would collapse after a little while of use.