Most scabs on the scalp aren’t cause for concern. They may be caused by exposure to an irritant or a mild skin condition, and either heal on their own or with over-the-counter (OTC) treatments.

Something about the sight of a scab brings on the urge to pick at it. You may even think you’d be doing a good thing by pulling the crust off a wound and “letting the air get to it.” But there’s no ...