A hollow feeling when tapped inside the right rib cage may be caused by diseases such as costochondritis, tuberculosis and pneumoconiosis cavitation. 1. costochondritis: in costochondritis, there will be benign hyperplasia of the ribs, the cells will become bigger, the cartilage membrane will become thinner, and there will be a hollow feeling when you tap. 2. Tuberculosis: Tuberculosis cavitation is a common disease secondary to tuberculosis, and a few primary tuberculosis will also have cavitation, mainly because Mycobacterium tuberculosis enters into the lungs, resulting in caseous necrosis of lung tissues, and in the vicinity of necrotic areas, granulation tissues are gradually increasing, and ultimately forming a fibrous envelope. 3. Pneumoconiosis cavity: Pneumoconiosis cavity refers to the formation of gas inhalation after the necrosis of diseased tissue in the lungs, and there is a hollow feeling when it is patted. The right side of the ribs inside the shot with a hollow feeling may also be seen in emphysema, fibrous cavity and other diseases, if the right side of the ribs inside the shot with a hollow feeling of the symptoms, it is recommended to seek medical attention in time, to clarify the cause of the symptoms of the treatment.