My husband has joined me in our goal of completing c25k! We are in week 4, doing run 1 last night. Starting last week, he developed a pain between the arch and the hard part of the heel. Kinda in the spongy part of the heel. He is telling me he can't feel it when he runs but it hurts later. As he gets up moving for the day, it seems to loosen up and doesn't seem to hurt as bad. Any advice in what may be causing the pain? Thank you so much!