There are more causes of discomfort in the rib cage, and the common ones are as follows: 1. Damage to the soft tissues around the rib cage may be caused by overexertion, sudden sneezing, repeated violent coughing, repeated lifting of heavy objects, and other easily ignored conditions that cause damage to the soft tissues of the chest. If the injury is relatively mild, local discomfort may occur. If the chest is overly active, it may lead to increased discomfort and even pain. 2. Small misalignments in the intervertebral joints of the thoracic spine may also cause discomfort in the ribs. The range of motion of the thoracic vertebrae is relatively small, and flexion and extension activities are limited by the rib cage and sternal connection fixation. The thoracic vertebrae can become misaligned under the action of prolonged body leaning forward, bending and arching back movements. The thoracic spine structure is stable, and the misalignment is not easy to reset, which will stimulate the intercostal nerve and cause symptoms of discomfort.