... of sand-crack is that attending simple laceration of the sensitive structures in a deep lesion. With the laceration all the phenomena of a repairing inflammation make their appearance. As a result, there is more or less heat according to the degree of inflammatory hyperaemia, swelling according to the amount of inflammatory exudate, and pain according to the amount of pressure the two foregoing bring to bear on the nerves ... — Diseases of the Horse's Foot • Harry Caulton Reeks
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