Let the wound under the scab heal before probing into the hair issue, that's the idea of the scab :-)
Hairs growing is not necessarily indicative of a problem or of a lack of a problem. Once the scab falls off (it's better if it falls in its own, and there might be another, smaller scab that replaces it), take a closer look. If the skin seems complete and there are no cuts or ooze - I don;t think you should be worried.
However, I am not a professional, and if you're really worried, go see someone who is.
