Chest pain after lifting heavy objects may be due to the following two reasons: 1. It is possible that when lifting heavy objects, the force is too heavy and leads to strains in the soft tissues of the chest, the most common being strains in the thoracic rib joints or the intercostal muscles in the anterior thoracic region. In addition to localized pain, it can also be accompanied by pain when breathing deeply or exerting the thorax, or it can be aggravated on top of the original pain. The symptoms will slowly improve through local rest and topical ointment.2. It is possible that spontaneous pneumothorax appears, usually with pulmonary alveoli, which are usually congenitally caused, and the local chest is suddenly strained, stimulating the rupture of the alveoli, which leads to chest pain. However, it is usually accompanied by pneumothorax and leads to chest tightness, dyspnea and other manifestations, which can be basically diagnosed by going to the hospital for a chest X-ray.