There is gas topping pain in the middle of the chest, the common clinical causes are mainly the following: a. Spontaneous pneumothorax, mostly seen in patients with large pulmonary alveoli spontaneous rupture during strenuous activity can cause spontaneous pneumothorax. A large amount of gas in the chest cavity compresses the lung tissue, and there is a painful gas top in the middle of the chest. For patients with respiratory distress, CT and X-ray examination of the chest can be improved and closed drainage of the chest cavity can be performed as soon as possible so as to reduce the symptoms of compression of lung tissue by gas in the chest cavity. Second, patients with acute gastric dilatation can suffer from pain and discomfort in the chest due to acute expansion and compression of the gastric body. Patients can improve abdominal CT examination to clarify the nature of the lesion, perform gastrointestinal decompression as soon as possible, and aspirate out the gas and fluid accumulation in the stomach. Patients are advised to fast absolutely and enhance intravenous rehydration support treatment. After the gastric contents are suctioned, the symptoms of chest compression can be relieved more quickly.