There can be burning and tingling
sensations as an area heals following previous injury. In fact, there can be increased sensitivity to a stimulus, a condition known as hyperalgesia
. Chances of a hairline fracture
is quite less given the mechanism of the injury and the soft tissue
padding of the heel but in any event, any hairline fracture is managed conservatively. Therefore, if you have no problems in walking then you do not have any serious problems.