Soreness of the sternum when moving is considered to be related to overwork, costochondritis, pleurisy and other diseases. 1. Excessive exertion: usually due to prolonged heavy physical labor or intense exercise, resulting in damage around the sternum, which in turn leads to the phenomenon of a little soreness of the sternum movement. 2. Costochondritis: usually due to the inflammatory reaction of the hose at the intersection of the sternum and the ribs, and will gradually stimulate the sternum, so that the sternum is subjected to more intense stimulation in a short period of time, which leads to the phenomenon of a little soreness of the sternum movement. 3. Pleurisy: it may be due to inflammatory lesions in the pleura, resulting in the stimulation of inflammation in the dirty pleura and the wall pleura, causing pain in the whole thoracic cavity of the organism, and the sternum will gradually appear painful phenomenon. The phenomenon of the sternum moving a little sore, may also be other reasons, such as trauma, bone tumors, etc., should be timely to the hospital for consultation, so as not to delay the condition.